Antoher thing is that you can't use media and radiosity at the same time.
This has a very logical explanation: The radiosity is calculated only when
the recursion level is less or equal to the recursion_limit value (AFAIK).
This means that when you have a container object, the ray leaving this object
will be at recursion level 3 (it has hit 2 surfaces) so no radiosity is
calculated when that ray hits something (or even if it's calculated, if
you have a very high recursion_limit, the result will not be the same
as at recursion level 1 (ie. the ray that is shot from the camera)).

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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