in news:web.3e547aa166b09a13fbe3eac40@news.povray.org WhiteZebra wrote:

> I'm trying to code the cornell box but using Photons Mapping instead of
> radiosity.

POV-Ray does not (yet?) support photons for global illumination. It only 
supports reflected and refracted caustics. So to see these caustics you 
have to shoot your photons at something that reflects or refracts (as part 
of the finish of an object).

Ingo

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