so i have worked with particles a little bit prior to this so i kinda already no the basic principles.
i had done them for a rocket trail in my second year so opened that scene file and had a look at what i had done.
basically create an emitter, parent that to the back of the rocket. go into particle shape and create a life ramp so that the trail dies off at the end.
you then need to make sure the particles are set to a random lifespan.
once that is done, change the colour to a ramp, so the younger particles are lighter and the older ones are darker as they get further away from the thruster. after that set the radius to a ramp so the older the particle the larger it gets as it desperses then finally fades away.
by adding a turbulence field and messing around with the magnitude and threshold you can get really random flowing movement from the particles.
here are some tests i've done.
colour test
looking pretty good, might need to tweak the colours a little for the final thing.
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