My particle uses GPU sprites so when I try to add a collision module it only gives the option of Collision (Scene Depth) which does not have the properties you refer to. I can find them if I add a new emitter and have enabled ApplyPhysics and set the ParticleMass to various values (20 up to 10000), this still doesn’t cause the particle to interact with the pillar. I’ve edited my question with further details.
