Ed Kaiser wrote:
> 
> ...and how do you add it to and equation like x^2+y^2+z^2-1 ?

#declare f = function { pigment {...}}
...
function {x^2+y^2+z^2-1+f(x, y, z))
...

		Jerome
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* they'll tell you what can't * mailto:ber### [at] inamecom
* be done and why...          * http://www.enst.fr/~jberger
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