Hi guys,

I have a hollow shape that is expanding. Inside that shape, I am emitting particles fluid created with a ScatterSOP.
It's all good till a certain point where suddenly, everything explodes.
That shape is turned into a VDB, I am using volume collision (Mode Volume sample.
Substeps are at 8 min and max.

Any clues or things I could try?

Thank you very much

well, only using the volume VDB and removing the geometry from the sop path in the static object seems to fix the problem.
Could anyone explain to me why?

But I notice that the liquid doesn't fill the inside of my shape. If I remove the collision, the liquid falls normally while being generated but with the collision, only the liquid is generated on the surface, there is no filling.

Does anyone know why?

Thank you

So now, I fixed one problem, but I get a new one in return for free

I made my collision volume way thicker, which I didn't want to because I can't get a nice liquid filling closely along the inside surface but at least, it fills up the inside until a certain frame, and then, it suddenly stops.

I noticed by visualising collisions in the flip object (the stuff in purple) that my collision area reverses itself at a specific time (it kind of inverts the sign of the SDF. I mean not kinda, this is what happens!)
I figured out it comes from my shape (this flower thing) which starts as a closed shape (a hollow shape but closed), and then it opens from the top. And it is at that specific moment my liquid starts to act weird. It doesn't fill, and it gets extremely slow.

Any idea how to fix this? So far, I managed to fix everything but now, it starts to get too tricky and I am sure the answer will be a line of Vex to tell my volume to not inverse itself at the specific frame but I don't know how to do this.

Or is it somethign else?

Cheers!!