 So you need a moving texture for your boosters not a problem. If you have a basic 3d object with a basic flame alpha map, grab any royalty free molten lava looking sun surface texture that you can find right click and create a new material set blend mode to translucent and shaded to unlit hold t and left click to add two texture nodes set the first one to your booster and the second one to your lava then hold m and left click three times to get a few multiply nodes grab a paner node texture coordinate node an ad node and a particle color node and drag everything together like so and if you increase this value on the paner the lava will distort your main image and if you change this number over here that changes the intensity of the lava distortion you're done hope that helps and as always hope you have a fantastic day and i'll see you