200km/h ? your map looks a little small for those speeds {unless this is just a test map then forgive me} 200km/h is what like 55 m/s so on an 8k*8k map you would go from one edge to the opposite in 2.25 mins. that’s pretty **** fast. im no expert on particles, just my own experience. if you are really moving @ 55UU/s then your current way is probably the easiest way. one thing off the top of my head is changing the angle and speed of the emitter based on current speed, so you don’t get that light speed effect that looks like rain is following you.