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Blender/Cycles Principled Hair BSDF にはバグがある

Last updated at Posted at 2020-06-22

Blender/Cycles の Principled Hair BSDF は, pbrt-v3 のコードを参考に 2018 年ごろに GSoC で実装(移植)されました

しかし, 元の pbrt-v3 実装にはバグがありました. 実に三年(!)近い年月を経て, pbrt-v3 では治っています.

この反映はまだ Blender/Cycles には取り込まれていません.

具体的には, いくらかシェーディングがおかしくなります.
Blender/Cycles で Hair のシェーディングがなんとなくうまくいかないな〜と思ったら, このバグが原因かもしれません.

TODO

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