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Cycles: add a sharpness input to the Cubic SSS falloff. When set to 1 this will

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give a result more similar to the Compatible falloff option. The scale is x2
though to keep the perceived scatter radius roughly the same while changing the
sharpness. Difference with compatible will be mainly on non-flat geometry.
This commit is contained in:
Brecht Van Lommel
2013-09-03 22:39:17 +00:00
parent 9467d99405
commit b314209356
14 changed files with 161 additions and 40 deletions
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7
intern/cycles/kernel/shaders/stdosl.h
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@@ -465,11 +465,12 @@ closure color holdout() BUILTIN;
closure color ambient_occlusion() BUILTIN;
// BSSRDF
closure color bssrdf_cubic(normal N, vector radius) BUILTIN;
closure color bssrdf_gaussian(normal N, vector radius) BUILTIN;
closure color bssrdf_cubic(normal N, vector radius, float texture_blur, float sharpness) BUILTIN;
closure color bssrdf_gaussian(normal N, vector radius, float texture_blur) BUILTIN;
// Backwards compatibility
closure color bssrdf_cubic(normal N, vector radius) BUILTIN;
closure color bssrdf_gaussian(normal N, vector radius) BUILTIN;
closure color specular_toon(normal N, float size, float smooth) BUILTIN;
// Renderer state