On Mon, 21 Jun 1999 14:47:02 -0500, Chris Huff wrote:
>Official POV-Ray doesn't do reflecting light, but there is an unofficial
>version which has a feature called photon mapping, which can do this. It
>is called UVPov, and is at:

The photon patch doesn't do diffuse interreflection (e.g. ceilings)  
It only does reflection from specular surfaces (e.g. mirrors).  
For diffuse interreflection you want to use the radiosity features 
that are in the official POV, or fake it with a suitable area light.

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