VRayMultiSubTex - V-Ray for 3ds Max - Global Site
Random Hue/Saturation/Gamma – These three parameters control post-process randomization of output color. Input value is percentage of the HSV/gamma range and specifies the maximum random deviation, where gamma range is fixed to [1/10,10]. See the Random Hue/Sat/Gamma example below.
This is kind of a confusingly written and could probably stand to use a little more verbosity. (Also there is no V randomization in the HSV). It’s not explicitly stated that the values are all normalized or not onto a 0-100 scale. Is 100 a ±180 degree color wheel shift? Or is 180 a full hue shift?
Maybe something like this:
Random Hue/Saturation/Gamma – These parameters apply randomized color adjustments during post-processing. Each value specifies themaximum deviation from the original value normalized to a 0-100 scale:
- Hue: Interpreted as a percentage of a 360° color wheel shift, with 100 meaning up to a full ±180° of hue shift.
- Saturation: Percentage-based; 100 allows saturation to vary up to ±100% of its original value, though values beyond ±100% will be clamped. (or not ? Would be nice to have in the docs)
- Gamma: Value is divided by 10 and added by 1.0. Variation is the Gamma and inverse Gamma. E.g. a value of 15 would correspond to a gamma range of
gamma(1.5**[± 1.0]**+1.0) (maybe that math is off now that I think about it. But something like that).