Just a note, I tried it and got an error.
Adding 'rgb' in front of the colour vectors in the color_map fixed the
problem. Well at least I think it did, I no longer get a parser error
but my scene has no visible dispersion. However, this may be due to the
design of my scene rather than a complete failure of the dispersion
feature.

I'm going to play around with the scene and see what happens.

-- 
Chris Maryan
mailto:cma### [at] geocitiescom
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