Kirk Andrews wrote:

> Speaking of--is there a way to use different functions to create the 
> various parts of the color vector in a pigment{}?  That is, I would like 
> to use one function to control the pigment and another to control the 
> alpha.  I know I could do it using a texture_map, but is there another 
> way?  It seems like there should be, but I can't think how to do it.

You can use a pigment_map instead of a texture_map,
but I don't think it will get simpler than that.

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