- Fri Aug 31, 2018 2:47 am
If you're mixing emitters with any of the other types of lighting (Physical Sky, IBL) Maxwell will prioritize the emitters and especially for interiors this means that the lighting from the emitters will be clean much faster than IBL or PhySky (especially if you use Sun with PhySky). So what happens is Maxwell also keeps wasting calculations in the already clean emitter lighting instead of concentrating everything on the IBL/PhySky which is where it's needed. The solution is to actually render twice, one with only emitters, and then the IBL or PhySky, then merge the renders in Linear Add mode (using 32bit EXR or TIFF files).
You render once for the emitters to about SL 15 (in many cases the lighting even for an interior will be clean by SL 15-16), then for the Phy Sky to at least 18-19. But the combined render time will be a few hours shorter at least, compared to rendering both types of emitters in the same go.
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