Fix UV export for decal/overlay meshes#1105
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Hmm, this should already be handled in EDIT: To answer my question: it's because of separate vertex buffers. |
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CreateVertexBufferAccessors numbers TEXCOORD/COLOR accessors locally per vertex buffer, so each buffer starts from TEXCOORD_0.
When a draw call uses multiple vertex buffers (geometry + a separate lightmap UV buffer) the second buffer's TEXCOORD_0 would silently overwrite the first's on the primitive which would replace the primary UV with the lightmap UV.
Before:
After:
