Jet engine effect (shock diamonds/mach disks)

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I realized that you don’t have to do the entire plume in one particle system. This effect uses three systems: one for the main plume, another for the shock diamonds, and a third for streak effects.

The shock diamonds / mach disks have a cyclic extrapolation IPO on their halo size, and also have a procedural magic texture with a colourband applied, as well as have ‘star’ on.

Some things I want to try:
Create ‘negative zones’ offset exactly from the ‘positive zones’ as seen in pictures like
Make the tail flicker.
Take better advantage of the new particle system, possibly including support for arbitrary durations.
Better effects upon startup/shutdown.

Thank you! I’ve been looking for a decent jet effect for ages.