Hey all, I've been running my head around this, but can't seem to find a fast solution. Lets say Ive got a Pyro volume in .bgeo and I want to subtract sections of the volume , say wrap my camera in a box and delete any volume inside that box to speed up rendering,or just remove any arbitrary section of the sim with like a boolean type opp.

I've tried using a volume mix sop subtract but it only removes a portion of the volume ‘leaving some behind’ . spliting up the volume in to it's individual primitives using a visibility sop / prim sop/ volume mix/ seems to work, but then something goes haywire when I re-merge the volume together and mantra won't render it….anyways thanks for your thoughts on this one !