On 16.12.2010 11:16, clipka wrote:
> As for specular, I intended to "sync" that with reflection intensity,
> because physically they're the very same phenomenon. It's not trivial
> though, as the proper relation between the "specular" parameter and the
> "reflection" intensity depends on the roughness of the material. Also,
> as I've learned recently, the specular highlights should follow the
> fresnel formula, which they don't.

In fact from my experience the missing fresnel falloff for specular 
highlights within POV-Ray is the most important issue that currently 
prevents any generic solution for rendering realistic skins.
I've faked it by either using aoi (a pain to setup and no generic 
solution) or blurred reflection (incredible long render times and 
therefor of no *practical* use).
For short: it is currently not possible to do something as simple as a 
classical Hollywood-Three-Point-Lighting portrait shot within POV-Ray 
and getting any satisfying result :(

-Ive

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