Hi! Have you had any luck with this? I’m currently trying to increase the resolution of PMREM generated mips for low roughness levels. I’ve tried to play with LOD_MIN, LOD_MAX and other constants, but this breaks the layout of the resulting environment map. So I think the only way for me is to study the algorithm of PMREMGenerator. Unfortunately I couldn’t find any textual description of this algorithm (besides the code itself, of course). If anyone knows where to find any info on the algorithm I would appreciate much!
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