How to stop prevent particles entering the inside of the box

this our game sit:

some particles would jump to the cuboid inside.

Have any ways can make particles to rebound after the collision cuboid?

Thank you very much.

PlayCanvas particles do not physically interact with the environment. There is currently no mechanism to achieve this will the particlesystem component.

However, it doesn’t appear that you spawn a high number of particles. So you could potentially code your own particle motion and use regular primitive shapes.