forked from bartvdbraak/blender
69dc0c3192
There are several fixes in here, which hopefully will make the shader working correct without too much magic in there. First of all, this commit brings BURLEY_TRUNCATE down from 30 to 16 which reduces noise a lot. It's still higher than original truncate from Brecht, but this reduces PDF value at a cutoff distance by an order of magnitude (now it's 0.008387, previously it was 0.063521 for the albedo of 0.8 and radius 1.0). This should converge to a proper result faster and don't have artifacts. This kind of reverts fix for T47356, but after additional thinking came to conclusion Burley is not being totally smooth, it is about giving less waxy results which it's kind of doing in the file. Second of all, this commit fixes burley_eval() to use normalized diffusion reflectance. This matches the way we calculate CDF and solves numeric instability close to 0, making PDF profile looking closer to other SSS profiles: https://developer.blender.org/F282355 https://developer.blender.org/F282356 https://developer.blender.org/F282357 Reviewers: brecht Reviewed By: brecht Differential Revision: https://developer.blender.org/D1792 |
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| .. | ||
| bsdf_ashikhmin_shirley.h | ||
| bsdf_ashikhmin_velvet.h | ||
| bsdf_diffuse_ramp.h | ||
| bsdf_diffuse.h | ||
| bsdf_hair.h | ||
| bsdf_microfacet.h | ||
| bsdf_oren_nayar.h | ||
| bsdf_phong_ramp.h | ||
| bsdf_reflection.h | ||
| bsdf_refraction.h | ||
| bsdf_toon.h | ||
| bsdf_transparent.h | ||
| bsdf_util.h | ||
| bsdf.h | ||
| bssrdf.h | ||
| emissive.h | ||
| volume.h | ||