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helpless photons

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SSGGMM
helpless photons
on Jun 20, 2007 at 6:58:35 pm

Is there a trick or technique to help prevent GI photons from blowing away helplessly into deep space?

I have a street exterior and I can't help but feel that the 10% or so photons that fly away are really increasing my render time. I know it's not like final gathering, but is there a way to keep them all MORE OR LESS in the same area? Like a big box with primary visibility turned off, only better?


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