Vincent Le Chevalier wrote:

> That's the key. I'm not too sure POVRay's radiosity gives an unbiased 
> result even with all settings turned up to the best quality. If there is 
> just one reflective surface in the mix I'm downright sure it does not...

I do recall somebody rendered a radiosity scene with no photon maps at 
all, and yet a large curved mirror still produced correct caustics. (It 
was a damn long time ago now though, so I'd never be able to find the 
image...)

> Even throwing photons in I believe there are situations POV will not 
> handle correctly. Can we do a wall lighting one side of a room because 
> it is itself lit by a light reflecting in a mirror?
> 
> Yeah, I should try myself :-)

Radiosity ought to do it - although it may or may not require some 
fairly crazy settings...

-- 
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