destroy on collision or change shape of container

Hello! I’ve been trying out TFD for C4D and loving it. I had one thing I was trying to do that I’m having difficulty with, which is I’d like the particles to be defined by a different shape than the square container.

For example, if I had a half circle around my scene, I don’t want the particles to collide and be affected from a physics standpoint, but to collide and disappear/be destroyed in the same way they are when they reach the edge of the container. Is this possible? Thanks so much!

If you are talking about particles driven by TFD velocity then use thinking particles and set a TPVolume kill set to kill particles outside of an area defined by the container size.