3.1 New Hair Shader
V-Ray Next introduces a new hair shader (VRayHairNextMtl) that is based on physiological values.
To get natural hair colors - use the “melanin” value. The higher the value the darker the color of the hair.
With the “pheomelanin” you can introduce redness in the hair color. To give variation in the individual hairs, use the “Randomization” rollout.
To dye the hair in other color (purple for example) you first need to remove all the melanin from it. Once you have a white hair you can introduce “dye color”. Again, you can introduce variation in the dye as well.
The tint alters the color of the reflection or the transmission (light going through the hair strands).