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rainbow-app avatar rainbow-app commented on July 18, 2024 1

Right. I forgot that I've seen this discussion in Veach. Thanks.

I can't argue whether the additional complexity of the fix is worthy for your, general (unlike mine, special) system. Not worthy -- fine with me.

from pbrt-v4.

mmp avatar mmp commented on July 18, 2024

I think this is a case of the general issue that MIS can slightly increase variance in "easy" cases where one sampling technique is very effective. (This can also be seen, for example, with regular direct lighting on a diffuse surface from an area light; sampling the BSDF and applying MIS often gives slightly higher variance than just sampling the light source.)

So, I think it's a good observation but I don't think there's anything to fix on the pbrt side of things.

from pbrt-v4.

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