Add mode input to sheen_bsdf #1880
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This changelist adds a `mode` input to `sheen_bsdf`, allowing the user to select between Conty-Kulla and Zeltner sheen models. The Zeltner model is initially supported only in GLSL, ESSL, and MSL, integrating recent work from Stephen Hill, with OSL and MDL falling back to the Conty-Kulla model for now. The graph implementation of `open_pbr_surface` has been updated to take advantage of this new feature, and the `open_pbr_velvet.mtlx` example has been adjusted to take the visual behavior of Zeltner sheen into account.
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| bsdf.throughput = vec3(1.0 - dirAlbedo * weight); | ||
| bsdf.response = Li * color * dirAlbedo * weight; |
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Since these lines are the same as in the if clause, you could move them to the end (and make dirAlbedo non-local).
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Good suggestion, and will do!
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This changelist adds a
modeinput tosheen_bsdf, allowing the user to select between Conty-Kulla and Zeltner sheen models.The Zeltner model is initially supported only in GLSL, ESSL, and MSL, integrating recent work from Stephen Hill, with OSL and MDL falling back to the Conty-Kulla model for now.
The graph implementation of
open_pbr_surfacehas been updated to take advantage of this new feature, and theopen_pbr_velvet.mtlxexample has been adjusted to take the visual behavior of Zeltner sheen into account.