I have this RPG tool that shoots rockets with a ParticleEmitter for smoke. My problem is that when the RPG hits something it deletes the rocket and its ParticleEmitter, which also removes any left over particles.
Is there a way to either keep these particles when deleting the emitter, or to keep the emitter in workspace until all particles have died?
That depends on how long your particles stay visible. Experiment with different times and start a timer based on the correct amount of time needed to let your particles disappear gradually before destroying.