Add russian roulette to kill rays that don't contribute much to the scene. #1785
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leMaik
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Rendering the same scene for a minute. With RR (min ray depth 3; 540 SPP): Wihout RR (280 SPP): |
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Fixes #1018
This needs more testing. Somehow this breaks for first reflection (emitters become way too bright) and it also makes emitters brighter (maybe related to branching?).