edversicherung Posted July 6, 2023 Share Posted July 6, 2023 Hey guys. I want to cut a smoke object with a collider so the collider leaves a gap in the smoke and advects it slightly. managed to get the advection stuff going but the smoke always closes after the collider. i used a trail sop to build like a wall behind the collider and i works okayish but there must be a better way of doing this. also i cant get rid of the flickering when the collider goes through the smoke. maybe some one has an idea how to solve this stuff. SmokeTrail.hiplc Quote Link to comment Share on other sites More sharing options...
Atom Posted July 7, 2023 Share Posted July 7, 2023 You can leave a trail of a collider behind your cylinder. The flickering is a viewport bug that's been there for years. Everyone looks past it now. Just focus on your render output. ap_CutSmokeTrail.hiplc 3 Quote Link to comment Share on other sites More sharing options...
edversicherung Posted July 7, 2023 Author Share Posted July 7, 2023 cool thanks a lot! Quote Link to comment Share on other sites More sharing options...
bengaet Posted July 21, 2023 Share Posted July 21, 2023 you can also sample the density only at the first frame of the sim with $F==1 (if you have solve on creation frame checked, otherwise add 1), that way it also cuts a trail into the density field but due to the advection a bit of smoke might go into the trail again which feels a little more natural imo, ofc it depends on the desired look Quote Link to comment Share on other sites More sharing options...
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