> The spikes are true media effect: the sphere has an internal light_source
> and the light comes throught the holes of the cracked sphere, which is
> sourrounded by scattering media. BUT, in order to have well-defined
> 'spikes' I had to increase media samples up to 200 (yes, two hundred), and
> only one interval.

Owch rendertimes? It took 12 hrs to render 800*600 on a 3.2 ghz machine 
then I saw I'd messed up the crackle pattern and got a seam.
Roll on the multiprocessor release of pov - although that won't help you 
with radiosity.

I'll be expecting the radiosity version of this scene in May then.

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