"PoD" <pod### [at] merlinnetau> wrote :
>
> pigment{ rgbf <1,1,1,-1> }
> finish{ ambient 0.5 }  // this value threw me
>

    That makes a nice raised look (I am using text) but not quite an
inverse. What I want would be something that shows white over black ,black
over white, purple over green, green over purple... so that rgb<1,1,0> would
be rgb<0,0,1> etc.

    I would just manually (mathematically) change the pigment, but I want
one part of the object to show one value and the other part to show another
as it moves around. I think it could be done with media and I am going to
try today, but I would rather have a pigment.

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