I have a flight game and I'm trying to add smoke trails to the engines. I am using the "smoke trail" prefab. It is just dragged on and placed in the heirachy, but disappears when the plane starts flying. The plane is very fast, and I think it has something to do with this. Any help?
2 Answers
2To check, go to scene mode during Play, and select the emmiter. If the X and Z are changing, it's moving with you. Could try using F and it should jump you to the back of the engine, where the emitter is.
The particles are probably too small, too far apart (due to speed) and too dim. Try setting Min/Max size to 30 as a test. You might see puffs that are far apart, so you know it's attached.
A trick for very fast emitters is to use StretchParticles->Stretch (in the Renderer.) That says to grow them in the direction of motion and billboard them around that line (like for a laser blast.) If you play with EmmiterVelocityScale (0.05 is plenty), they will get a little bit of the speed your engine is moving, which stretch can then key off of for which way to stretch. You have to run it to see what they look like, since in edit mode they aren't moving, so have nowhere to stretch.
Stretched particles is fine-tuning -- the last step. The first step is to do some testing (make them huge, last even longer...) to be sure you are making them, in the right places. If you select the emmiter, then Play->Scene view should highlight the particles. Figure out where they are (or if they are nowhere, you'll know the emitter isn't turned on.)
– Owen-ReynoldsSimulation Space → World
Does the particle emmite simulate in worldspace (it's a checkbox option in the inspector).
– anon73820239