Orchid XP v7 wrote:
> 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...)
> 

Well, strange...
In the docs it is written:
"
The brightness of radiosity in POV-Ray is based on two things:

    1. the amount of light "gathered"
    2. the 'diffuse' property of the surface finish
"
<http://www.povray.org/documentation/view/3.6.1/270/>

So it seems pretty clear that radiosity does not take the specular path, 
ever, because the "reflection" property is not considered. Which means 
that rays doing:
Light->specular->diffuse->diffuse->camera (the situation I described)
or Light->diffuse->specular->diffuse->camera (as in the image Nicolas 
posted)
are never created.

But if there is a scene proving me wrong I'd be glad to see it.

-- 
Vincent

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