Romain Guy bf0dc32ee3 Change specularAmbientOcclusion from boolean to enum (#2352) ...

The user can now choose amongst 3 specular AO methods:
- None, specAO is off
- Simple, specAO is inferred from roughness and diffuse AO
- Bent normals, specAO is computed accurately from cone intersections

The last method is more expensive but produces the best results.

This change also fixes a few issues:
- Rename materialRefraction() and materialRefractionType() for
  consistency
- Fixes user time in shaders

2020-04-07 09:19:48 -07:00

15 KiB

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