That looks interesting, i wonder why there are no artefacts although count
is only 100. 

Have you tried an inside view? 

I would also try to increase recursion_limit and at the same time reduce
brightness, that could lead to interesting results, 

It would be slower oof course.  

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other 
things on: http://www.schunter.etc.tu-bs.de/~chris/

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