Chris R

jarjarshaq

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Recent Forum Posts

Pyro Smoke Collision Banding Artifacts 2026年4月14日19:17


So either disabling Correct Collisions or removing density from the Field to Correct parm "fixes" the issue. I know this is not what I should do. But based on this it seems that collision field isn't doing a great job reseting the density field and creating these artifacts.

Edit: Interestingly if you use a Velocity Voxel Size multiplier, it will also affect the collision field.

Pyro Smoke Collision Banding Artifacts 2026年4月9日21:02

sepu
That looks correct - still tough to say without looking at your .hip
You might want to look at this (https://www.sidefx.com/forum/topic/103550/); you might be running into a similar situation.
I don't need the whole character, just where you are having issues or some repro.

Thanks for taking a look. Here's a sanitized hip. I have freeze-framed and stashed the geo.

Pyro Smoke Collision Banding Artifacts 2026年4月9日19:01

sepu
check the collision when is solving you might have a pretty low res sdf in there.
How are you feeding this into the solver? Can you post the .hip

I'll see about sanitizing the hip to post, but that'll be a bit of time. I have checked the collision field in the solver by turning on the visualizer for the pyro sparse object and it looks as expected, which is to say it looks like my collision sdf field at the sop leve.

I've tried sourcing the collider both with a static object and with a volume source dop (using collision and collisionvel fields).

I'll work on posting something maybe tomorrow-ish.