Help KillParticle after collision and shouldn't return

[josemendez]

Code:

if (emitter.isEmitting) // or when you emit your first particle
emitter.minPoolSize = 1;

This would work in your case, I think. minPoolSize prevents emission from starting until the percentage of pooled particles is above its value. So by setting it to 1 (100%) while emitting will prevent emission from restarting until there's more pooled particles than the blueprint's capacity, which will never happen. So once the barrel is empty, emission won't restart.