Cycles: glossy and anisotropic BSDF changes

* Anisotropic BSDF now supports GGX and Beckmann distributions, Ward has been
  removed because other distributions are superior.
* GGX is now the default distribution for all glossy and anisotropic nodes,
  since it looks good, has low noise and is fast to evaluate.
* Ashikhmin-Shirley is now available in the Glossy BSDF.

1 files changed, 2 insertions, 1 deletions

diff --git a/intern/cycles/kernel/shaders/stdosl.h b/intern/cycles/kernel/shaders/stdosl.h
index 20ee4a3df32..e39db8097f2 100644
--- a/intern/cycles/kernel/shaders/stdosl.h
+++ b/intern/cycles/kernel/shaders/stdosl.h
@@ -483,11 +483,12 @@ closure color reflection(normal N) BUILTIN;
 closure color refraction(normal N, float eta) BUILTIN;
 closure color transparent() BUILTIN;
 closure color microfacet_ggx(normal N, float ag) BUILTIN;
+closure color microfacet_ggx_aniso(normal N, vector T, float ax, float ay) BUILTIN;
 closure color microfacet_ggx_refraction(normal N, float ag, float eta) BUILTIN;
 closure color microfacet_beckmann(normal N, float ab) BUILTIN;
+closure color microfacet_beckmann_aniso(normal N, vector T, float ax, float ay) BUILTIN;
 closure color microfacet_beckmann_refraction(normal N, float ab, float eta) BUILTIN;
 closure color ashikhmin_shirley(normal N, vector T,float ax, float ay) BUILTIN;
-closure color ward(normal N, vector T,float ax, float ay) BUILTIN;
 closure color ashikhmin_velvet(normal N, float sigma) BUILTIN;
 closure color emission() BUILTIN;
 closure color background() BUILTIN;