diff options
| author | Brecht Van Lommel <brechtvanlommel@pandora.be> | 2013-08-28 23:22:46 +0400 |
|---|---|---|
| committer | Brecht Van Lommel <brechtvanlommel@pandora.be> | 2013-08-28 23:22:46 +0400 |
| commit | 841fe45df95cfbd1c5b21465656aabe4de911ae0 (patch) | |
| tree | 46ae5ba059f1718c1c2a8bdf7f8653cdb5420c1b | |
| parent | 7ba41a3c7cd674f2f8814960132c6fe64ded6262 (diff) | |
Cycles: change Gaussian subsurface scattering falloff to be more similar to
the Cubic falloff, see here for details.
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/Shaders#Subsurface_Scattering
| -rw-r--r-- | intern/cycles/kernel/closure/bssrdf.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/intern/cycles/kernel/closure/bssrdf.h b/intern/cycles/kernel/closure/bssrdf.h index e5f26f25c41..d6f889f3285 100644 --- a/intern/cycles/kernel/closure/bssrdf.h +++ b/intern/cycles/kernel/closure/bssrdf.h @@ -50,7 +50,7 @@ __device float bssrdf_gaussian_eval(ShaderClosure *sc, float r) { /* integrate (2*pi*r * exp(-r*r/(2*v)))/(2*pi*v)) from 0 to Rm * = 1 - exp(-Rm*Rm/(2*v)) */ - const float v = sc->data0; + const float v = sc->data0*sc->data0*(0.25f*0.25f); const float Rm = sqrtf(v*GAUSS_TRUNCATE); if(r >= Rm) @@ -72,7 +72,7 @@ __device void bssrdf_gaussian_sample(ShaderClosure *sc, float xi, float *r, floa /* xi = integrate (2*pi*r * exp(-r*r/(2*v)))/(2*pi*v)) = -exp(-r^2/(2*v)) * r = sqrt(-2*v*logf(xi)) */ - const float v = sc->data0; + const float v = sc->data0*sc->data0*(0.25f*0.25f); const float Rm = sqrtf(v*GAUSS_TRUNCATE); /* 1.0 - expf(-Rm*Rm/(2*v)) simplified */ |