From 09771cc16e8c8d8ec0f81c53efb460d04f238328 Mon Sep 17 00:00:00 2001
From: Stijn Buys <ingar@osirion.org>
Date: Fri, 28 Dec 2012 14:59:28 +0000
Subject: Cleanup pf the repository, adding Spacescape tutorial files, added
 sky21 and sky22, added planet Antwerp rings texture.

---
 bitmaps/fx/circle00.svg                            |  98 ----
 bitmaps/fx/circle01.xcf                            | Bin 404154 -> 0 bytes
 bitmaps/fx/corona.xcf                              | Bin 1569308 -> 0 bytes
 bitmaps/fx/flare00.xcf                             | Bin 4463 -> 0 bytes
 bitmaps/fx/flare01.xcf                             | Bin 16145 -> 0 bytes
 bitmaps/osirion.ico                                | Bin 7406 -> 0 bytes
 bitmaps/osiriond.ico                               | Bin 7406 -> 0 bytes
 icons/osirion.ico                                  | Bin 0 -> 7406 bytes
 icons/osiriond.ico                                 | Bin 0 -> 7406 bytes
 sky/sky01.xml                                      | 559 ++++++++++-----------
 sky/sky21.xml                                      | 335 ++++++++++++
 sky/sky22.xml                                      | 270 ++++++++++
 sky/tutorial-01.xml                                |  66 +++
 sky/tutorial-02.xml                                | 129 +++++
 sky/tutorial-03.xml                                | 198 ++++++++
 sky/tutorial-04.xml                                | 217 ++++++++
 sky/tutorial-05.xml                                | 236 +++++++++
 sky/tutorial-06.xml                                | 255 ++++++++++
 sky/tutorial-07.xml                                | 274 ++++++++++
 sky/tutorial-08.xml                                | 293 +++++++++++
 textures/common/origin.xcf                         | Bin 0 -> 2347 bytes
 textures/corona/default.xcf                        | Bin 0 -> 1569308 bytes
 textures/fx/circle00.svg                           |  98 ++++
 textures/fx/circle01.xcf                           | Bin 0 -> 404154 bytes
 textures/fx/flare00.xcf                            | Bin 0 -> 4463 bytes
 textures/fx/flare01.xcf                            | Bin 0 -> 16145 bytes
 textures/planets/antwerp_rings.xcf                 | Bin 0 -> 1653574 bytes
 wiki/spacescape/Spacescape-flares.png              | Bin 0 -> 91839 bytes
 wiki/spacescape/Spacescape-tutorial-00.png         | Bin 0 -> 104965 bytes
 wiki/spacescape/Spacescape-tutorial-01.png         | Bin 0 -> 31326 bytes
 wiki/spacescape/Spacescape-tutorial-02.png         | Bin 0 -> 7413 bytes
 wiki/spacescape/Spacescape-tutorial-03-preview.png | Bin 0 -> 19310 bytes
 wiki/spacescape/Spacescape-tutorial-03.png         | Bin 0 -> 33952 bytes
 wiki/spacescape/Spacescape-tutorial-04-preview.png | Bin 0 -> 20093 bytes
 wiki/spacescape/Spacescape-tutorial-04.png         | Bin 0 -> 31851 bytes
 wiki/spacescape/Spacescape-tutorial-05.png         | Bin 0 -> 31815 bytes
 wiki/spacescape/Spacescape-tutorial-06-preview.png | Bin 0 -> 148297 bytes
 wiki/spacescape/Spacescape-tutorial-06.png         | Bin 0 -> 26670 bytes
 wiki/spacescape/Spacescape-tutorial-07-preview.png | Bin 0 -> 180970 bytes
 wiki/spacescape/Spacescape-tutorial-07.png         | Bin 0 -> 26626 bytes
 wiki/spacescape/Spacescape-tutorial-08-preview.png | Bin 0 -> 188546 bytes
 wiki/spacescape/Spacescape-tutorial-08.png         | Bin 0 -> 27507 bytes
 wiki/spacescape/Spacescape-tutorial-export.png     | Bin 0 -> 21793 bytes
 43 files changed, 2641 insertions(+), 387 deletions(-)
 delete mode 100644 bitmaps/fx/circle00.svg
 delete mode 100644 bitmaps/fx/circle01.xcf
 delete mode 100644 bitmaps/fx/corona.xcf
 delete mode 100644 bitmaps/fx/flare00.xcf
 delete mode 100644 bitmaps/fx/flare01.xcf
 delete mode 100755 bitmaps/osirion.ico
 delete mode 100755 bitmaps/osiriond.ico
 create mode 100755 icons/osirion.ico
 create mode 100755 icons/osiriond.ico
 create mode 100644 sky/sky21.xml
 create mode 100644 sky/sky22.xml
 create mode 100644 sky/tutorial-01.xml
 create mode 100644 sky/tutorial-02.xml
 create mode 100644 sky/tutorial-03.xml
 create mode 100644 sky/tutorial-04.xml
 create mode 100644 sky/tutorial-05.xml
 create mode 100644 sky/tutorial-06.xml
 create mode 100644 sky/tutorial-07.xml
 create mode 100644 sky/tutorial-08.xml
 create mode 100644 textures/common/origin.xcf
 create mode 100644 textures/corona/default.xcf
 create mode 100644 textures/fx/circle00.svg
 create mode 100644 textures/fx/circle01.xcf
 create mode 100644 textures/fx/flare00.xcf
 create mode 100644 textures/fx/flare01.xcf
 create mode 100644 textures/planets/antwerp_rings.xcf
 create mode 100644 wiki/spacescape/Spacescape-flares.png
 create mode 100644 wiki/spacescape/Spacescape-tutorial-00.png
 create mode 100644 wiki/spacescape/Spacescape-tutorial-01.png
 create mode 100644 wiki/spacescape/Spacescape-tutorial-02.png
 create mode 100644 wiki/spacescape/Spacescape-tutorial-03-preview.png
 create mode 100644 wiki/spacescape/Spacescape-tutorial-03.png
 create mode 100644 wiki/spacescape/Spacescape-tutorial-04-preview.png
 create mode 100644 wiki/spacescape/Spacescape-tutorial-04.png
 create mode 100644 wiki/spacescape/Spacescape-tutorial-05.png
 create mode 100644 wiki/spacescape/Spacescape-tutorial-06-preview.png
 create mode 100644 wiki/spacescape/Spacescape-tutorial-06.png
 create mode 100644 wiki/spacescape/Spacescape-tutorial-07-preview.png
 create mode 100644 wiki/spacescape/Spacescape-tutorial-07.png
 create mode 100644 wiki/spacescape/Spacescape-tutorial-08-preview.png
 create mode 100644 wiki/spacescape/Spacescape-tutorial-08.png
 create mode 100644 wiki/spacescape/Spacescape-tutorial-export.png

diff --git a/bitmaps/fx/circle00.svg b/bitmaps/fx/circle00.svg
deleted file mode 100644
index 84a1abb..0000000
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@@ -1,98 +0,0 @@
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diff --git a/bitmaps/fx/circle01.xcf b/bitmaps/fx/circle01.xcf
deleted file mode 100644
index 0855637..0000000
Binary files a/bitmaps/fx/circle01.xcf and /dev/null differ
diff --git a/bitmaps/fx/corona.xcf b/bitmaps/fx/corona.xcf
deleted file mode 100644
index 8741f02..0000000
Binary files a/bitmaps/fx/corona.xcf and /dev/null differ
diff --git a/bitmaps/fx/flare00.xcf b/bitmaps/fx/flare00.xcf
deleted file mode 100644
index f80b67e..0000000
Binary files a/bitmaps/fx/flare00.xcf and /dev/null differ
diff --git a/bitmaps/fx/flare01.xcf b/bitmaps/fx/flare01.xcf
deleted file mode 100644
index 936273b..0000000
Binary files a/bitmaps/fx/flare01.xcf and /dev/null differ
diff --git a/bitmaps/osirion.ico b/bitmaps/osirion.ico
deleted file mode 100755
index ce6735c..0000000
Binary files a/bitmaps/osirion.ico and /dev/null differ
diff --git a/bitmaps/osiriond.ico b/bitmaps/osiriond.ico
deleted file mode 100755
index 170c1a1..0000000
Binary files a/bitmaps/osiriond.ico and /dev/null differ
diff --git a/icons/osirion.ico b/icons/osirion.ico
new file mode 100755
index 0000000..ce6735c
Binary files /dev/null and b/icons/osirion.ico differ
diff --git a/icons/osiriond.ico b/icons/osiriond.ico
new file mode 100755
index 0000000..170c1a1
Binary files /dev/null and b/icons/osiriond.ico differ
diff --git a/sky/sky01.xml b/sky/sky01.xml
index a84cc5f..e811fa8 100644
--- a/sky/sky01.xml
+++ b/sky/sky01.xml
@@ -1,289 +1,270 @@
-<?xml version="1.0" encoding="utf-8" ?>
-<spacescapelayers>
-    <layer>
-        <destBlendFactor>one</destBlendFactor>
-        <farColor>0 0 0 1</farColor>
-        <maskEnabled>false</maskEnabled>
-        <maskGain>0.5</maskGain>
-        <maskLacunarity>2</maskLacunarity>
-        <maskNoiseType>fbm</maskNoiseType>
-        <maskOctaves>1</maskOctaves>
-        <maskOffset>1</maskOffset>
-        <maskPower>1</maskPower>
-        <maskScale>1</maskScale>
-        <maskSeed>1</maskSeed>
-        <maskThreshold>0</maskThreshold>
-        <name>point stars white</name>
-        <nearColor>1 1 1 1</nearColor>
-        <numPoints>10000</numPoints>
-        <pointSize>1</pointSize>
-        <seed>56</seed>
-        <sourceBlendFactor>one</sourceBlendFactor>
-        <type>points</type>
-    </layer>
-    <layer>
-        <destBlendFactor>one</destBlendFactor>
-        <farColor>0 0 0 1</farColor>
-        <maskEnabled>false</maskEnabled>
-        <maskGain>0.5</maskGain>
-        <maskLacunarity>2</maskLacunarity>
-        <maskNoiseType>fbm</maskNoiseType>
-        <maskOctaves>1</maskOctaves>
-        <maskOffset>1</maskOffset>
-        <maskPower>1</maskPower>
-        <maskScale>1</maskScale>
-        <maskSeed>1</maskSeed>
-        <maskThreshold>0</maskThreshold>
-        <name>point stars purple</name>
-        <nearColor>0.666667 0.333333 1 1</nearColor>
-        <numPoints>10000</numPoints>
-        <pointSize>1</pointSize>
-        <seed>5695</seed>
-        <sourceBlendFactor>one</sourceBlendFactor>
-        <type>points</type>
-    </layer>
-    <layer>
-        <destBlendFactor>one</destBlendFactor>
-        <farColor>0 0 0 1</farColor>
-        <maskEnabled>false</maskEnabled>
-        <maskGain>0.5</maskGain>
-        <maskLacunarity>2</maskLacunarity>
-        <maskNoiseType>fbm</maskNoiseType>
-        <maskOctaves>1</maskOctaves>
-        <maskOffset>1</maskOffset>
-        <maskPower>1</maskPower>
-        <maskScale>1</maskScale>
-        <maskSeed>1</maskSeed>
-        <maskThreshold>0</maskThreshold>
-        <name>point stars blue</name>
-        <nearColor>0.0431373 0.905882 1 1</nearColor>
-        <numPoints>10000</numPoints>
-        <pointSize>1</pointSize>
-        <seed>3691</seed>
-        <sourceBlendFactor>one</sourceBlendFactor>
-        <type>points</type>
-    </layer>
-    <layer>
-        <destBlendFactor>one</destBlendFactor>
-        <farColor>0 0 0 1</farColor>
-        <maskEnabled>false</maskEnabled>
-        <maskGain>0.5</maskGain>
-        <maskLacunarity>2</maskLacunarity>
-        <maskNoiseType>fbm</maskNoiseType>
-        <maskOctaves>1</maskOctaves>
-        <maskOffset>1</maskOffset>
-        <maskPower>1</maskPower>
-        <maskScale>1</maskScale>
-        <maskSeed>1</maskSeed>
-        <maskThreshold>0</maskThreshold>
-        <name>point stars white large</name>
-        <nearColor>1 1 1 1</nearColor>
-        <numPoints>2500</numPoints>
-        <pointSize>2</pointSize>
-        <seed>78</seed>
-        <sourceBlendFactor>one</sourceBlendFactor>
-        <type>points</type>
-    </layer>
-    <layer>
-        <destBlendFactor>one</destBlendFactor>
-        <farColor>0 0 0 1</farColor>
-        <maskEnabled>false</maskEnabled>
-        <maskGain>0.5</maskGain>
-        <maskLacunarity>2</maskLacunarity>
-        <maskNoiseType>fbm</maskNoiseType>
-        <maskOctaves>1</maskOctaves>
-        <maskOffset>1</maskOffset>
-        <maskPower>1</maskPower>
-        <maskScale>1</maskScale>
-        <maskSeed>1</maskSeed>
-        <maskThreshold>0</maskThreshold>
-        <name>point stars purple large</name>
-        <nearColor>0.666667 0.333333 1 1</nearColor>
-        <numPoints>2500</numPoints>
-        <pointSize>2</pointSize>
-        <seed>2721</seed>
-        <sourceBlendFactor>one</sourceBlendFactor>
-        <type>points</type>
-    </layer>
-    <layer>
-        <destBlendFactor>one</destBlendFactor>
-        <farColor>0 0 0 1</farColor>
-        <maskEnabled>false</maskEnabled>
-        <maskGain>0.5</maskGain>
-        <maskLacunarity>2</maskLacunarity>
-        <maskNoiseType>fbm</maskNoiseType>
-        <maskOctaves>1</maskOctaves>
-        <maskOffset>1</maskOffset>
-        <maskPower>1</maskPower>
-        <maskScale>1</maskScale>
-        <maskSeed>1</maskSeed>
-        <maskThreshold>0</maskThreshold>
-        <name>point stars blue large</name>
-        <nearColor>0.0431373 0.905882 1 1</nearColor>
-        <numPoints>2500</numPoints>
-        <pointSize>2</pointSize>
-        <seed>3675</seed>
-        <sourceBlendFactor>one</sourceBlendFactor>
-        <type>points</type>
-    </layer>
-    <layer>
-        <destBlendFactor>dest_colour</destBlendFactor>
-        <farColor>1 1 1 1</farColor>
-        <maskEnabled>false</maskEnabled>
-        <maskGain>0.5</maskGain>
-        <maskLacunarity>2</maskLacunarity>
-        <maskNoiseType></maskNoiseType>
-        <maskOctaves>2</maskOctaves>
-        <maskOffset>1</maskOffset>
-        <maskPower>1</maskPower>
-        <maskScale>1</maskScale>
-        <maskSeed>7</maskSeed>
-        <maskThreshold>0</maskThreshold>
-        <maxSize>0.015</maxSize>
-        <minSize>0.005</minSize>
-        <name>billboard stars white</name>
-        <nearColor>1 1 1 1</nearColor>
-        <numBillboards>250</numBillboards>
-        <seed>91</seed>
-        <sourceBlendFactor>src_colour</sourceBlendFactor>
-        <texture>osirion-flare-04.png</texture>
-        <type>billboards</type>
-    </layer>
-    <layer>
-        <destBlendFactor>dest_colour</destBlendFactor>
-        <farColor>1 1 1 1</farColor>
-        <maskEnabled>false</maskEnabled>
-        <maskGain>0.5</maskGain>
-        <maskLacunarity>2</maskLacunarity>
-        <maskNoiseType>fbm</maskNoiseType>
-        <maskOctaves>2</maskOctaves>
-        <maskOffset>1</maskOffset>
-        <maskPower>1</maskPower>
-        <maskScale>1</maskScale>
-        <maskSeed>7</maskSeed>
-        <maskThreshold>0</maskThreshold>
-        <maxSize>0.015</maxSize>
-        <minSize>0.005</minSize>
-        <name>billboard stars blue</name>
-        <nearColor>0.333333 0.666667 1 1</nearColor>
-        <numBillboards>250</numBillboards>
-        <seed>5976</seed>
-        <sourceBlendFactor>src_colour</sourceBlendFactor>
-        <texture>osirion-flare-07.png</texture>
-        <type>billboards</type>
-    </layer>
-    <layer>
-        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
-        <ditherAmount>0.03</ditherAmount>
-        <gain>0.5</gain>
-        <innerColor>0 0 0 1</innerColor>
-        <lacunarity>2</lacunarity>
-        <name>background dust</name>
-        <noiseType>ridged</noiseType>
-        <octaves>8</octaves>
-        <offset>1</offset>
-        <outerColor>0 0 0 1</outerColor>
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-        <previewTextureSize>256</previewTextureSize>
-        <scale>1</scale>
-        <seed>0</seed>
-        <shelfAmount>0.8</shelfAmount>
-        <sourceBlendFactor>zero</sourceBlendFactor>
-        <type>noise</type>
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-    <layer>
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-        <ditherAmount>0.03</ditherAmount>
-        <gain>0.5</gain>
-        <innerColor>0.552941 0.552941 0.415686 1</innerColor>
-        <lacunarity>5</lacunarity>
-        <name>nebula brown</name>
-        <noiseType>fbm</noiseType>
-        <octaves>8</octaves>
-        <offset>1</offset>
-        <outerColor>0 0 0 1</outerColor>
-        <powerAmount>0.5</powerAmount>
-        <previewTextureSize>256</previewTextureSize>
-        <scale>1</scale>
-        <seed>0</seed>
-        <shelfAmount>0</shelfAmount>
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-        <type>noise</type>
-    </layer>
-    <layer>
-        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
-        <ditherAmount>0.03</ditherAmount>
-        <gain>0.2</gain>
-        <innerColor>0.435294 0.494118 0.54902 1</innerColor>
-        <lacunarity>5</lacunarity>
-        <name>nebula blue</name>
-        <noiseType>fbm</noiseType>
-        <octaves>12</octaves>
-        <offset>1</offset>
-        <outerColor>0 0 0 1</outerColor>
-        <powerAmount>0.4</powerAmount>
-        <previewTextureSize>256</previewTextureSize>
-        <scale>0.5</scale>
-        <seed>458</seed>
-        <shelfAmount>0</shelfAmount>
-        <sourceBlendFactor>one</sourceBlendFactor>
-        <type>noise</type>
-    </layer>
-    <layer>
-        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
-        <ditherAmount>0.03</ditherAmount>
-        <gain>0.5</gain>
-        <innerColor>0 0 0 1</innerColor>
-        <lacunarity>2</lacunarity>
-        <name>nebula black</name>
-        <noiseType>ridged</noiseType>
-        <octaves>8</octaves>
-        <offset>1</offset>
-        <outerColor>0 0 0 1</outerColor>
-        <powerAmount>0.1</powerAmount>
-        <previewTextureSize>256</previewTextureSize>
-        <scale>1</scale>
-        <seed>0</seed>
-        <shelfAmount>0</shelfAmount>
-        <sourceBlendFactor>zero</sourceBlendFactor>
-        <type>noise</type>
-    </layer>
-    <layer>
-        <destBlendFactor>one</destBlendFactor>
-        <ditherAmount>0.03</ditherAmount>
-        <gain>0.5</gain>
-        <innerColor>0.435294 1 0.670588 1</innerColor>
-        <lacunarity>2</lacunarity>
-        <name>nebula green</name>
-        <noiseType>ridged</noiseType>
-        <octaves>8</octaves>
-        <offset>1</offset>
-        <outerColor>0 0 0 1</outerColor>
-        <powerAmount>0.05</powerAmount>
-        <previewTextureSize>512</previewTextureSize>
-        <scale>1</scale>
-        <seed>58913</seed>
-        <shelfAmount>0.5</shelfAmount>
-        <sourceBlendFactor>one</sourceBlendFactor>
-        <type>noise</type>
-    </layer>
-    <layer>
-        <destBlendFactor>src_alpha</destBlendFactor>
-        <ditherAmount>0.03</ditherAmount>
-        <gain>0.5</gain>
-        <innerColor>0 0 1 1</innerColor>
-        <lacunarity>2</lacunarity>
-        <name>nebula blue</name>
-        <noiseType>ridged</noiseType>
-        <octaves>10</octaves>
-        <offset>1</offset>
-        <outerColor>0 0 0.337255 1</outerColor>
-        <powerAmount>1.5</powerAmount>
-        <previewTextureSize>256</previewTextureSize>
-        <scale>1</scale>
-        <seed>7890</seed>
-        <shelfAmount>0</shelfAmount>
-        <sourceBlendFactor>one_minus_src_alpha</sourceBlendFactor>
-        <type>noise</type>
-    </layer>
-</spacescapelayers>
+<?xml version="1.0" encoding="utf-8" ?>
+<spacescapelayers>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars white</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>56</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars purple</name>
+        <nearColor>0.666667 0.333333 1 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>5695</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars blue</name>
+        <nearColor>0.0431373 0.905882 1 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>3691</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars white large</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>78</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars purple large</name>
+        <nearColor>0.666667 0.333333 1 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>2721</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars blue large</name>
+        <nearColor>0.0431373 0.905882 1 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>3675</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>dest_colour</destBlendFactor>
+        <farColor>1 1 1 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>2</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>7</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.015</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars white</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>91</seed>
+        <sourceBlendFactor>src_colour</sourceBlendFactor>
+        <texture>osirion-flare-04.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <farColor>1 1 1 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>2</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>7</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.015</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars blue</name>
+        <nearColor>0.333333 0.666667 1 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>5976</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <texture>osirion-flare-08.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.03</ditherAmount>
+        <gain>0.5</gain>
+        <innerColor>0 0 1 1</innerColor>
+        <lacunarity>4</lacunarity>
+        <name>nebula dark  blue</name>
+        <noiseType>fbm</noiseType>
+        <octaves>10</octaves>
+        <offset>1</offset>
+        <outerColor>0 0 0 1</outerColor>
+        <powerAmount>0.75</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>7890</seed>
+        <shelfAmount>0</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.01</ditherAmount>
+        <gain>0.5</gain>
+        <innerColor>0 0 0 1</innerColor>
+        <lacunarity>2</lacunarity>
+        <name>background dust</name>
+        <noiseType>ridged</noiseType>
+        <octaves>8</octaves>
+        <offset>1</offset>
+        <outerColor>0 0 0 1</outerColor>
+        <powerAmount>0.5</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>0</seed>
+        <shelfAmount>0.5</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <ditherAmount>0.03</ditherAmount>
+        <gain>0.5</gain>
+        <innerColor>0.435294 1 0.670588 1</innerColor>
+        <lacunarity>2</lacunarity>
+        <name>nebula green</name>
+        <noiseType>ridged</noiseType>
+        <octaves>8</octaves>
+        <offset>1</offset>
+        <outerColor>0 0 0 1</outerColor>
+        <powerAmount>0.05</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>58913</seed>
+        <shelfAmount>0.4</shelfAmount>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.03</ditherAmount>
+        <gain>0.5</gain>
+        <innerColor>0.552941 0.552941 0.415686 1</innerColor>
+        <lacunarity>5</lacunarity>
+        <name>nebula brown</name>
+        <noiseType>fbm</noiseType>
+        <octaves>8</octaves>
+        <offset>1</offset>
+        <outerColor>0 0 0 1</outerColor>
+        <powerAmount>0.5</powerAmount>
+        <previewTextureSize>256</previewTextureSize>
+        <scale>1</scale>
+        <seed>0</seed>
+        <shelfAmount>0</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.03</ditherAmount>
+        <gain>0.2</gain>
+        <innerColor>0.360784 0.670588 1 1</innerColor>
+        <lacunarity>5</lacunarity>
+        <name>nebula blue</name>
+        <noiseType>fbm</noiseType>
+        <octaves>10</octaves>
+        <offset>1</offset>
+        <outerColor>0 0 0 1</outerColor>
+        <powerAmount>1.5</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>0.25</scale>
+        <seed>458</seed>
+        <shelfAmount>0.5</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+</spacescapelayers>
diff --git a/sky/sky21.xml b/sky/sky21.xml
new file mode 100644
index 0000000..3afd81e
--- /dev/null
+++ b/sky/sky21.xml
@@ -0,0 +1,335 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<spacescapelayers>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars white</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>134</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars white large</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>135</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars blue</name>
+        <nearColor>0.333333 1 1 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>136</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars yellow large</name>
+        <nearColor>0.333333 1 1 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>137</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 0 0 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars purple</name>
+        <nearColor>1 0.666667 1 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>138</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 0 0 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars purple large</name>
+        <nearColor>1 0.658824 0.345098 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>139</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 1 1 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.012</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars blue</name>
+        <nearColor>0.333333 0.666667 1 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>140</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <texture>osirion-flare-07.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.03</ditherAmount>
+        <gain>0.5</gain>
+        <innerColor>0 0 0 1</innerColor>
+        <lacunarity>4</lacunarity>
+        <name>background dust</name>
+        <noiseType>fbm</noiseType>
+        <octaves>4</octaves>
+        <offset>1</offset>
+        <outerColor>0 0 0 1</outerColor>
+        <powerAmount>1</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>142</seed>
+        <shelfAmount>0.2</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <farColor>1 0.666667 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.01</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars yellow</name>
+        <nearColor>1 1 0.498039 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>143</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <texture>osirion-flare-04.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0.333333 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.015</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars green</name>
+        <nearColor>0 0.666667 0 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>141</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <texture>osirion-flare-03.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.03</ditherAmount>
+        <gain>0.5</gain>
+        <innerColor>0.666667 0.666667 0 1</innerColor>
+        <lacunarity>3</lacunarity>
+        <name>nebula streaks</name>
+        <noiseType>ridged</noiseType>
+        <octaves>8</octaves>
+        <offset>1</offset>
+        <outerColor>0 0 0 0</outerColor>
+        <powerAmount>0.2</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>150</seed>
+        <shelfAmount>0.5</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.03</ditherAmount>
+        <gain>0.5</gain>
+        <innerColor>1 0.333333 0 1</innerColor>
+        <lacunarity>2.5</lacunarity>
+        <name>nebula brown</name>
+        <noiseType>fbm</noiseType>
+        <octaves>8</octaves>
+        <offset>1</offset>
+        <outerColor>0.141176 0.0705882 0.211765 1</outerColor>
+        <powerAmount>1</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>152</seed>
+        <shelfAmount>0.15</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.025</ditherAmount>
+        <gain>0.75</gain>
+        <innerColor>0 0 0 1</innerColor>
+        <lacunarity>2.5</lacunarity>
+        <name>nebula ridges</name>
+        <noiseType>ridged</noiseType>
+        <octaves>8</octaves>
+        <offset>1</offset>
+        <outerColor>0 0 0 0</outerColor>
+        <powerAmount>0.25</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>152</seed>
+        <shelfAmount>0.5</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.025</ditherAmount>
+        <gain>0.6</gain>
+        <innerColor>0 0 0 1</innerColor>
+        <lacunarity>2</lacunarity>
+        <name>nebula highlights</name>
+        <noiseType>fbm</noiseType>
+        <octaves>8</octaves>
+        <offset>1</offset>
+        <outerColor>0 0.666667 0.498039 1</outerColor>
+        <powerAmount>0.8</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>152</seed>
+        <shelfAmount>0.5</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <ditherAmount>0.03</ditherAmount>
+        <gain>0.2</gain>
+        <innerColor>1 1 1 1</innerColor>
+        <lacunarity>4</lacunarity>
+        <name>nebula spots</name>
+        <noiseType>fbm</noiseType>
+        <octaves>6</octaves>
+        <offset>1</offset>
+        <outerColor>0 0 0 1</outerColor>
+        <powerAmount>0.4</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>152</seed>
+        <shelfAmount>0.5</shelfAmount>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0.580392 0.580392 0.580392 1</farColor>
+        <maskEnabled>true</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0.5</maskThreshold>
+        <maxSize>0.015</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars white</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numBillboards>100</numBillboards>
+        <seed>152</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <texture>default.png</texture>
+        <type>billboards</type>
+    </layer>
+</spacescapelayers>
diff --git a/sky/sky22.xml b/sky/sky22.xml
new file mode 100644
index 0000000..133edcb
--- /dev/null
+++ b/sky/sky22.xml
@@ -0,0 +1,270 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<spacescapelayers>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <farColor>0.490196 0.490196 0.490196 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars white</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>101</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <farColor>0.227451 0 0.345098 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars purple</name>
+        <nearColor>0.666667 0.333333 1 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>102</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <farColor>0.203922 0.203922 0.615686 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars blue</name>
+        <nearColor>0.333333 0.333333 1 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>103</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars white large</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>104</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <farColor>0.333333 0.333333 0 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars green large</name>
+        <nearColor>0.211765 0.427451 0 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>105</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars blue large</name>
+        <nearColor>0.0431373 0.905882 1 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>106</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <farColor>0.580392 0.580392 0.580392 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>2</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>7</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.015</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars white</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>107</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <texture>osirion-flare-07.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <farColor>1 1 1 1</farColor>
+        <maskEnabled>true</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>2</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>7</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.012</maxSize>
+        <minSize>0.004</minSize>
+        <name>billboard stars blue</name>
+        <nearColor>0.47451 0.745098 1 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>121</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <texture>osirion-flare-04.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.025</ditherAmount>
+        <gain>0.03</gain>
+        <innerColor>0 0 0 1</innerColor>
+        <lacunarity>2</lacunarity>
+        <name>background dust</name>
+        <noiseType>fbm</noiseType>
+        <octaves>4</octaves>
+        <offset>1</offset>
+        <outerColor>0 0 0 1</outerColor>
+        <powerAmount>0.75</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>120</seed>
+        <shelfAmount>0.1</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.03</ditherAmount>
+        <gain>0.5</gain>
+        <innerColor>0 0.45098 0.45098 1</innerColor>
+        <lacunarity>2</lacunarity>
+        <name>nebula cyan</name>
+        <noiseType>fbm</noiseType>
+        <octaves>8</octaves>
+        <offset>1</offset>
+        <outerColor>0 0 0 1</outerColor>
+        <powerAmount>1</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>121</seed>
+        <shelfAmount>0.2</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.03</ditherAmount>
+        <gain>0.5</gain>
+        <innerColor>1 1 0.498039 1</innerColor>
+        <lacunarity>2.5</lacunarity>
+        <name>nebula cyan highlights</name>
+        <noiseType>fbm</noiseType>
+        <octaves>8</octaves>
+        <offset>1</offset>
+        <outerColor>0 0 0 1</outerColor>
+        <powerAmount>1</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>121</seed>
+        <shelfAmount>0.5</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.03</ditherAmount>
+        <gain>0.5</gain>
+        <innerColor>1 1 0 1</innerColor>
+        <lacunarity>2.5</lacunarity>
+        <name>nebula yellow</name>
+        <noiseType>fbm</noiseType>
+        <octaves>8</octaves>
+        <offset>1</offset>
+        <outerColor>0 0 0 1</outerColor>
+        <powerAmount>1</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>139</seed>
+        <shelfAmount>0.5</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.03</ditherAmount>
+        <gain>0.5</gain>
+        <innerColor>1 0 0 1</innerColor>
+        <lacunarity>2.75</lacunarity>
+        <name>nebula yellow highlights</name>
+        <noiseType>fbm</noiseType>
+        <octaves>8</octaves>
+        <offset>1</offset>
+        <outerColor>0 0 0 1</outerColor>
+        <powerAmount>1</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>139</seed>
+        <shelfAmount>0.6</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+</spacescapelayers>
diff --git a/sky/tutorial-01.xml b/sky/tutorial-01.xml
new file mode 100644
index 0000000..ce7e556
--- /dev/null
+++ b/sky/tutorial-01.xml
@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<spacescapelayers>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars white</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>3856</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars yellow</name>
+        <nearColor>1 1 0 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>382</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 0 0 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars orange</name>
+        <nearColor>1 0.658824 0.345098 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>3821</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+</spacescapelayers>
diff --git a/sky/tutorial-02.xml b/sky/tutorial-02.xml
new file mode 100644
index 0000000..26d95d2
--- /dev/null
+++ b/sky/tutorial-02.xml
@@ -0,0 +1,129 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<spacescapelayers>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars white</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>3856</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars white large</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>38576</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars yellow</name>
+        <nearColor>1 1 0 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>382</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars yellow large</name>
+        <nearColor>1 1 0 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>13831</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 0 0 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars orange</name>
+        <nearColor>1 0.658824 0.345098 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>3821</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 0 0 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars orange large</name>
+        <nearColor>1 0.658824 0.345098 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>9823344</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+</spacescapelayers>
diff --git a/sky/tutorial-03.xml b/sky/tutorial-03.xml
new file mode 100644
index 0000000..658a15c
--- /dev/null
+++ b/sky/tutorial-03.xml
@@ -0,0 +1,198 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<spacescapelayers>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars white</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>3856</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars white large</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>38576</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars yellow</name>
+        <nearColor>1 1 0 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>382</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars yellow large</name>
+        <nearColor>1 1 0 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>13831</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 0 0 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars orange</name>
+        <nearColor>1 0.658824 0.345098 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>3821</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 0 0 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars orange large</name>
+        <nearColor>1 0.658824 0.345098 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>9823344</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 1 1 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.012</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars white</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>629</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <texture>osirion-flare-07.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 1 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.015</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars yellow</name>
+        <nearColor>1 1 0.25098 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>631</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <texture>osirion-flare-07.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 0.25098 0.25098 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.01</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars red</name>
+        <nearColor>1 0 0 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>633</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <texture>osirion-flare-04.png</texture>
+        <type>billboards</type>
+    </layer>
+</spacescapelayers>
diff --git a/sky/tutorial-04.xml b/sky/tutorial-04.xml
new file mode 100644
index 0000000..9ef626c
--- /dev/null
+++ b/sky/tutorial-04.xml
@@ -0,0 +1,217 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<spacescapelayers>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars white</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>3856</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars white large</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>38576</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars yellow</name>
+        <nearColor>1 1 0 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>382</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars yellow large</name>
+        <nearColor>1 1 0 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>13831</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 0 0 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars orange</name>
+        <nearColor>1 0.658824 0.345098 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>3821</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 0 0 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars orange large</name>
+        <nearColor>1 0.658824 0.345098 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>9823344</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 1 1 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.012</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars white</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>629</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <texture>osirion-flare-07.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 1 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.015</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars yellow</name>
+        <nearColor>1 1 0.25098 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>631</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <texture>osirion-flare-07.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.03</ditherAmount>
+        <gain>0.5</gain>
+        <innerColor>0 0 0 1</innerColor>
+        <lacunarity>4</lacunarity>
+        <name>background dust</name>
+        <noiseType>fbm</noiseType>
+        <octaves>4</octaves>
+        <offset>1</offset>
+        <outerColor>0 0 0 1</outerColor>
+        <powerAmount>1</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>578</seed>
+        <shelfAmount>0.25</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <farColor>1 0.25098 0.25098 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.01</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars red</name>
+        <nearColor>1 0 0 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>633</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <texture>osirion-flare-04.png</texture>
+        <type>billboards</type>
+    </layer>
+</spacescapelayers>
diff --git a/sky/tutorial-05.xml b/sky/tutorial-05.xml
new file mode 100644
index 0000000..6b893d9
--- /dev/null
+++ b/sky/tutorial-05.xml
@@ -0,0 +1,236 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<spacescapelayers>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars white</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>3856</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars white large</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>38576</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars yellow</name>
+        <nearColor>1 1 0 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>382</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars yellow large</name>
+        <nearColor>1 1 0 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>13831</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 0 0 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars orange</name>
+        <nearColor>1 0.658824 0.345098 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>3821</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 0 0 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars orange large</name>
+        <nearColor>1 0.658824 0.345098 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>9823344</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 1 1 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.012</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars white</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>629</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <texture>osirion-flare-07.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 1 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.015</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars yellow</name>
+        <nearColor>1 1 0.25098 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>631</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <texture>osirion-flare-07.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.03</ditherAmount>
+        <gain>0.5</gain>
+        <innerColor>0 0 0 1</innerColor>
+        <lacunarity>4</lacunarity>
+        <name>background dust</name>
+        <noiseType>fbm</noiseType>
+        <octaves>4</octaves>
+        <offset>1</offset>
+        <outerColor>0 0 0 1</outerColor>
+        <powerAmount>1</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>578</seed>
+        <shelfAmount>0.25</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <farColor>1 0.25098 0.25098 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.01</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars red</name>
+        <nearColor>1 0 0 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>633</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <texture>osirion-flare-04.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.03</ditherAmount>
+        <gain>0.5</gain>
+        <innerColor>1 0.666667 0 1</innerColor>
+        <lacunarity>2.5</lacunarity>
+        <name>nebula brown</name>
+        <noiseType>fbm</noiseType>
+        <octaves>8</octaves>
+        <offset>1</offset>
+        <outerColor>0.666667 0.333333 0 0</outerColor>
+        <powerAmount>1</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>871</seed>
+        <shelfAmount>0.15</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+</spacescapelayers>
diff --git a/sky/tutorial-06.xml b/sky/tutorial-06.xml
new file mode 100644
index 0000000..ea892e3
--- /dev/null
+++ b/sky/tutorial-06.xml
@@ -0,0 +1,255 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<spacescapelayers>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars white</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>3856</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars white large</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>38576</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars yellow</name>
+        <nearColor>1 1 0 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>382</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars yellow large</name>
+        <nearColor>1 1 0 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>13831</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 0 0 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars orange</name>
+        <nearColor>1 0.658824 0.345098 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>3821</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 0 0 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars orange large</name>
+        <nearColor>1 0.658824 0.345098 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>9823344</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 1 1 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.012</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars white</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>629</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <texture>osirion-flare-07.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 1 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.015</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars yellow</name>
+        <nearColor>1 1 0.25098 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>631</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <texture>osirion-flare-07.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.03</ditherAmount>
+        <gain>0.5</gain>
+        <innerColor>0 0 0 1</innerColor>
+        <lacunarity>4</lacunarity>
+        <name>background dust</name>
+        <noiseType>fbm</noiseType>
+        <octaves>4</octaves>
+        <offset>1</offset>
+        <outerColor>0 0 0 1</outerColor>
+        <powerAmount>1</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>578</seed>
+        <shelfAmount>0.25</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <farColor>1 0.25098 0.25098 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.01</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars red</name>
+        <nearColor>1 0 0 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>633</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <texture>osirion-flare-04.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.03</ditherAmount>
+        <gain>0.5</gain>
+        <innerColor>1 0.666667 0 1</innerColor>
+        <lacunarity>2.5</lacunarity>
+        <name>nebula brown</name>
+        <noiseType>fbm</noiseType>
+        <octaves>8</octaves>
+        <offset>1</offset>
+        <outerColor>0.666667 0.333333 0 0</outerColor>
+        <powerAmount>1</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>871</seed>
+        <shelfAmount>0.15</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.025</ditherAmount>
+        <gain>0.6</gain>
+        <innerColor>1 1 1 1</innerColor>
+        <lacunarity>2.5</lacunarity>
+        <name>nebula highlights</name>
+        <noiseType>fbm</noiseType>
+        <octaves>8</octaves>
+        <offset>1</offset>
+        <outerColor>1 1 0.498039 1</outerColor>
+        <powerAmount>0.85</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>871</seed>
+        <shelfAmount>0.55</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+</spacescapelayers>
diff --git a/sky/tutorial-07.xml b/sky/tutorial-07.xml
new file mode 100644
index 0000000..63cd291
--- /dev/null
+++ b/sky/tutorial-07.xml
@@ -0,0 +1,274 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<spacescapelayers>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars white</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>3856</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars white large</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>38576</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars yellow</name>
+        <nearColor>1 1 0 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>382</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars yellow large</name>
+        <nearColor>1 1 0 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>13831</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 0 0 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars orange</name>
+        <nearColor>1 0.658824 0.345098 1</nearColor>
+        <numPoints>10000</numPoints>
+        <pointSize>1</pointSize>
+        <seed>3821</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 0 0 0</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <name>point stars orange large</name>
+        <nearColor>1 0.658824 0.345098 1</nearColor>
+        <numPoints>2500</numPoints>
+        <pointSize>2</pointSize>
+        <seed>9823344</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>points</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 1 1 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.012</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars white</name>
+        <nearColor>1 1 1 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>629</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <texture>osirion-flare-07.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>1 1 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.015</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars yellow</name>
+        <nearColor>1 1 0.25098 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>631</seed>
+        <sourceBlendFactor>one</sourceBlendFactor>
+        <texture>osirion-flare-07.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.03</ditherAmount>
+        <gain>0.5</gain>
+        <innerColor>0 0 0 1</innerColor>
+        <lacunarity>4</lacunarity>
+        <name>background dust</name>
+        <noiseType>fbm</noiseType>
+        <octaves>4</octaves>
+        <offset>1</offset>
+        <outerColor>0 0 0 1</outerColor>
+        <powerAmount>1</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>578</seed>
+        <shelfAmount>0.25</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <farColor>1 0.25098 0.25098 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType></maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
+        <maskSeed>1</maskSeed>
+        <maskThreshold>0</maskThreshold>
+        <maxSize>0.01</maxSize>
+        <minSize>0.005</minSize>
+        <name>billboard stars red</name>
+        <nearColor>1 0 0 1</nearColor>
+        <numBillboards>250</numBillboards>
+        <seed>633</seed>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <texture>osirion-flare-04.png</texture>
+        <type>billboards</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.03</ditherAmount>
+        <gain>0.5</gain>
+        <innerColor>1 0.666667 0 1</innerColor>
+        <lacunarity>2.5</lacunarity>
+        <name>nebula brown</name>
+        <noiseType>fbm</noiseType>
+        <octaves>8</octaves>
+        <offset>1</offset>
+        <outerColor>0.666667 0.333333 0 0</outerColor>
+        <powerAmount>1</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>871</seed>
+        <shelfAmount>0.15</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.025</ditherAmount>
+        <gain>0.6</gain>
+        <innerColor>1 1 1 1</innerColor>
+        <lacunarity>2.5</lacunarity>
+        <name>nebula highlights</name>
+        <noiseType>fbm</noiseType>
+        <octaves>8</octaves>
+        <offset>1</offset>
+        <outerColor>1 1 0.498039 1</outerColor>
+        <powerAmount>0.85</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>871</seed>
+        <shelfAmount>0.55</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+    <layer>
+        <destBlendFactor>one_minus_src_alpha</destBlendFactor>
+        <ditherAmount>0.025</ditherAmount>
+        <gain>0.75</gain>
+        <innerColor>0 0 0 1</innerColor>
+        <lacunarity>2.5</lacunarity>
+        <name>nebula ridges</name>
+        <noiseType>ridged</noiseType>
+        <octaves>8</octaves>
+        <offset>1</offset>
+        <outerColor>0 0 0 0</outerColor>
+        <powerAmount>0.25</powerAmount>
+        <previewTextureSize>512</previewTextureSize>
+        <scale>1</scale>
+        <seed>871</seed>
+        <shelfAmount>0.5</shelfAmount>
+        <sourceBlendFactor>src_alpha</sourceBlendFactor>
+        <type>noise</type>
+    </layer>
+</spacescapelayers>
diff --git a/sky/tutorial-08.xml b/sky/tutorial-08.xml
new file mode 100644
index 0000000..da5ff3e
--- /dev/null
+++ b/sky/tutorial-08.xml
@@ -0,0 +1,293 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<spacescapelayers>
+    <layer>
+        <destBlendFactor>one</destBlendFactor>
+        <farColor>0 0 0 1</farColor>
+        <maskEnabled>false</maskEnabled>
+        <maskGain>0.5</maskGain>
+        <maskLacunarity>2</maskLacunarity>
+        <maskNoiseType>fbm</maskNoiseType>
+        <maskOctaves>1</maskOctaves>
+        <maskOffset>1</maskOffset>
+        <maskPower>1</maskPower>
+        <maskScale>1</maskScale>
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