> when I found out that Povray does not use dispersion but just some 'fake
> caustics'.


Are you confusing dispersion with refraction? If so, look up "photons," a
newish version 3.5 feature.

If you're really talking about dispersion (which is what creates a rainbow
effect with refraction), look that up in the documentation also; it can be
used with photons, I believe.

 - Slime
[ http://www.slimeland.com/ ]

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