I want to render objects having a self-made 3D pigment that is defined
via 3 user-defined functions (one for red, one for green and one for
blue), or via one function that returns an RGB color vector directly

(Or even an 4- or 5-dimensional rgbf, rgbt or rgbft vector)

Is that possible, somehow?


As far as I understand a user-defined pigment functions just returns a
single float that is used as an index in a color_map.


			Lars R.

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