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Cycles: Enable SSS from Principled BSDF only when actually in use 

This gives speed up for the split kernel in scenes using the principled BSDF
but without subsurface scattering.
This commit is contained in:
Mai Lavelle 2017-07-12 04:36:46 -04:00
parent 8603424d0a
commit 87164114a3
2 changed files with 7 additions and 1 deletions
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6
intern/cycles/render/nodes.cpp
View File

@ -2337,6 +2337,12 @@ PrincipledBsdfNode::PrincipledBsdfNode()
distribution_orig = NBUILTIN_CLOSURES;
}
bool PrincipledBsdfNode::has_surface_bssrdf()
{
ShaderInput *subsurface_in = input("Subsurface");
return (subsurface_in->link != NULL || subsurface > CLOSURE_WEIGHT_CUTOFF);
}
void PrincipledBsdfNode::attributes(Shader *shader, AttributeRequestSet *attributes)
{
if(shader->has_surface) {

2
intern/cycles/render/nodes.h
View File

@ -374,7 +374,7 @@ public:
SHADER_NODE_CLASS(PrincipledBsdfNode)
bool has_spatial_varying() { return true; }
bool has_surface_bssrdf() { return true; }
bool has_surface_bssrdf();
bool has_bssrdf_bump();
void compile(SVMCompiler& compiler, ShaderInput *metallic, ShaderInput *subsurface, ShaderInput *subsurface_radius,
ShaderInput *specular, ShaderInput *roughness, ShaderInput *specular_tint, ShaderInput *anisotropic,