in news:418e2658$1@news.povray.org Tim Nikias wrote:

> You're asking for actual
> light-scattering according to wavelengths, which POV-Ray doesn't do
> unless you use photons, and using photons to light up the sky is...
> well... out of reach with current standard desktop PCs.
> 

Sky-POV has (simulates) wavelength dependent raleigh scattering:
http://www.geocities.com/SiliconValley/Program/9231/povray.html

Ingo

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