Daren Scot Wilson wrote:
> 
> No, actually, it's a sign that all the fundamental laws of logic, space and
> time are falling apart. The physical universe as we know will cease to exist...

Read too much of Douglas Adams, I guess? ;-)

> It is a bad thing that the dispersion patch has a hard-coded spectrum.  What we
> need is user-defined spectra, and then I won't ever be troubled by such
> questions.   And clever artists could then do some weird things.

Definitely. I'll give you some time...

> Consider the average refractor telescope's objective lens, or lenses in any
> optical instrument.  Normally these are made of two kinds of glass, for example
> crown glass and flint glass, with different dispersions.  How to model this in
> povray?

No problem, if every object can be assigned different dispersion
spectra.

> Lemme work on my IRTC entry, and in march I'll figure out how to allow
> user-defined dispersions.   In the meantime I'll accept ideas, suggestions.

Ok, ok,

> Later, for an encore, maybe I'll do birefringent materials and polarization...

Oh yeah, and please, please do coherent light, so that I can
finally model interference and laser speckle and the like,
hang on, man!!!

Markus
-- 

 Ich nicht eine Sekunde!!!" H. Heinol in Val Thorens

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