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

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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
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@@ -2337,6 +2337,12 @@ PrincipledBsdfNode::PrincipledBsdfNode()
distribution_orig = NBUILTIN_CLOSURES; 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) void PrincipledBsdfNode::attributes(Shader *shader, AttributeRequestSet *attributes)
{ {
if(shader->has_surface) { if(shader->has_surface) {

2
intern/cycles/render/nodes.h
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@@ -374,7 +374,7 @@ public:
SHADER_NODE_CLASS(PrincipledBsdfNode) SHADER_NODE_CLASS(PrincipledBsdfNode)
bool has_spatial_varying() { return true; } bool has_spatial_varying() { return true; }
bool has_surface_bssrdf() { return true; } bool has_surface_bssrdf();
bool has_bssrdf_bump(); bool has_bssrdf_bump();
void compile(SVMCompiler& compiler, ShaderInput *metallic, ShaderInput *subsurface, ShaderInput *subsurface_radius, void compile(SVMCompiler& compiler, ShaderInput *metallic, ShaderInput *subsurface, ShaderInput *subsurface_radius,
ShaderInput *specular, ShaderInput *roughness, ShaderInput *specular_tint, ShaderInput *anisotropic, ShaderInput *specular, ShaderInput *roughness, ShaderInput *specular_tint, ShaderInput *anisotropic,