Antonio Ferrari wrote:
> [...]
> 
> - the results that can be reached seems very poor, and in any case are only
> a rough approximation of BSSRDF real results;

To be frank this argument shown quite well the misconception you have 
about this effect.  POV-Ray scattering media is much more 'real' than 
any commonly used subsurface scattering trick you find advertised in 
other programs.  The point is of course these tricks can be much faster 
than a full media simulation but the above sentence as you wrote it is 
simply an inversion of reality.

Christoph

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