[Bf-committers] Volumetrics Update

[echelon at infomail.upr.edu.cu]

Hi all!


  Thanks to some code reusing I could implement the rest of the blender
specular models (Bill, Cook-Torrance,Ward-iso...) and look forward to
see if I could reuse also the difuse shader models to get it integrated
in volumetrics.
  Soon I'll upload the new test.