Somewhat related to the Pov part of your question :
http://news.povray.org/povray.binaries.images/thread/%3C3B97ABD4.5E70568D%40engineer.com%3E/

Thibaut



> I'm looking for a (free) renderer that does realistic subsurface scattering,
> using physical material parameters as input (i.e. absorption and scattering
> coefficients) - or a way to do it in POV. Rendering times don't matter, even if
> it takes days to render a simple wax sphere on a checkered plane. Main
> prerequisite is high physical accuracy.
> 
> I had hoped for a combination of scattering and absorbing media in POV to do the
> job, but it doesn't seem to work with real physical material properties - unless
> someone happens to know a reliable way to convert those properties to POV media
> parameters.
> 
> The parameters I have available - aside from index of refraction - are
> "absorption coefficients" and "reduced scattering coefficients" for red, green
> and blue light respectively (computed from measurements under the simplifying
> assumption that the "phase function" is isotropic).
> 
> Any ideas?
> 
> 
>

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