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Clarify normal-roughness buffer limitation for transparent objects rendering. #11584

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mhilbrunner merged 1 commit into from
Jan 10, 2026
Merged

Clarify normal-roughness buffer limitation for transparent objects rendering. #11584

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4 changes: 4 additions & 0 deletions tutorials/3d/3d_rendering_limitations.rst
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Expand Up @@ -119,6 +119,10 @@ other transparent materials, while Sorting Offset will move the object
forward or backward for the purpose of sorting. Even then, these may not
always be sufficient.

Transparent objects are not rendered to the normal-roughness buffer, as they are
drawn after opaque geometry. As a result, features that rely on the normal-roughness
buffer will not affect transparent materials.

Some rendering engines feature *order-independent transparency* techniques to
alleviate this, but this is costly on the GPU. Godot currently doesn't provide
this feature. There are still several ways to avoid this problem:
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