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Mention the normal map coordinate system expected by Godot

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Hugo Locurcio
2020-05-03 21:11:32 +02:00
parent e4f6430262
commit 53eedbfdd0
2 changed files with 26 additions and 3 deletions
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getting_started/workflow/assets/importing_images.rst
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@@ -128,6 +128,17 @@ reimported automatically.
Note that RGTC compression affects the resulting normal map image. You will have to adjust custom shaders that use the normal map to take this into account.
.. note::
Godot requires the normal map to use the X+, Y- and Z+ coordinates. In other
words, if you've imported a material made to be used with another engine, you
may have to convert the normal map so its Y axis is flipped. Otherwise, the
normal map direction may appear to be inverted on the Y axis.
More information about normal maps (including a coordinate order table for
popular engines) can be found
`here <http://wiki.polycount.com/wiki/Normal_Map_Technical_Details>`__.
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