forked from bartvdbraak/blender
Fix issue in last subsurface commit with branched path tracing, was rendering too bright.
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2c556c2ef7
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@ -221,18 +221,26 @@ __device int subsurface_scatter_multi_step(KernelGlobals *kg, ShaderData *sd, Sh
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disk_N = sd->Ng;
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make_orthonormals(disk_N, &disk_T, &disk_B);
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if(sd->randb_closure < 0.5f) {
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/* reusing variable for picking the closure gives a bit nicer stratification
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* for path tracer, for branched we do all closures so it doesn't help */
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float axisu = (all)? disk_u: sd->randb_closure;
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if(axisu < 0.5f) {
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pick_pdf_N = 0.5f;
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pick_pdf_T = 0.25f;
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pick_pdf_B = 0.25f;
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if(all)
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disk_u *= 2.0f;
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}
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else if(sd->randb_closure < 0.75f) {
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else if(axisu < 0.75f) {
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float3 tmp = disk_N;
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disk_N = disk_T;
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disk_T = tmp;
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pick_pdf_N = 0.25f;
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pick_pdf_T = 0.5f;
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pick_pdf_B = 0.25f;
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if(all)
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disk_u = (disk_u - 0.5f)*4.0f;
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}
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else {
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float3 tmp = disk_N;
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@ -241,6 +249,8 @@ __device int subsurface_scatter_multi_step(KernelGlobals *kg, ShaderData *sd, Sh
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pick_pdf_N = 0.25f;
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pick_pdf_T = 0.25f;
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pick_pdf_B = 0.5f;
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if(all)
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disk_u = (disk_u - 0.75f)*4.0f;
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}
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/* sample point on disk */
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