> Am 03.12.2010 10:07, schrieb KurtB:
>> Thank you both for your comments so far. I really appreciate your
>> pointers,
>> Alain, but I must apologize as the example I posted was not very
>> clear. I have
>> played around with this a bit more, and I discovered that the artifact
>> becomes
>> more pronounced if I increase the quality settings for radiosity.
>
> It still took me some time to recognize it, but yes, it's there: What at
> first glance looks like the edge of the cube is indeed an artifact.
>
> Unfortunately, all I can think of right now is: "My that's weird!"
>
> My current favorite culprit would be a problem in the radiosity code
> causing the media to illuminate only geometry outside its container. But
> that's just a guess.

Your guess seems to be comfirmed in my latest test. The dark line 
disapears when you cut out the part of the cylinder that intersect the 
box and you make sure there is a narrow gap between the container and 
the box.



Alain

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