Since engine version: 5.3.3 OC
A particle collision function. The particle will bounce off the ground on collision. If your particles get stuck instead of bouncing, you might need to increase the CollisionVertex value a bit.
array PC_Bounce(int bouncyness);
- Factor to multiply the new speed with. 1000 equals a factor of 1.0. Defaults to 1000.
See the particle documentation for further explanations of the particle system.