Tor Olav Kristensen wrote:
> 
> I just looked into the mechsim.inc file.
> 
> And now I remembe more. Wasn't it ABX who first
> showed some examples using pigment functions as
> vector functions ?

I don't know who 'invented' this technique.  Could be that ABX showed an
example for it recently.

> It is a pity though that the value ranges are
> limited.

This should not be much problem in most cases.

Christoph

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