The effect currently looks stupid, the whole trail vanishes the moment it hits something.
It’s probably getting garbage collected when the parent object (the rocket) is destroyed. I haven’t worked too much with particles, but the solution will probably be along the lines of:
- Detach the particle emitter actor from the rocket on impact. Keep the world location the same and it should look fine.
- Stop the emitter from emitting further particles.
- Destroy the particle emitter actor after the particles have dissipated.
1 is just calling “detach actor from actor”. 2 and 3 can probably be found in particle or cascade documents.
Hope this gets you on the right track.