Welcome — and thanks for stepping in for Dr Sassi! Looking forward to learning from you and really appreciate you taking the time to help the community here!

I just have a quick question I was hoping you could help with regarding pyro.

I have a pyro flame inside a sphere and I just want it to collide with the inner surface of the sphere so it can swirl around and look cool. I made the sphere a collider and it kind of works. However, no matter what I try (increasing substeps, collision thickness, slowing down particles etc) I can't stop some of the flames from escaping, part of it always goes though.

Any idea what im missing or how to get the collisions to work correctly?

Here's my project file: https://we.tl/t-r1YDAjYNVSJwZAUm

Thanks again and have a great Easter!