What would possibly be the best and least rendertimeexpensive way to create a rocket engines jetstream
matching the TOON WITH FALLOFF? style?

(I am experimenting with some glowing transparent shapes at the moment.) Lensflare,streaks maybe?

Has anybody by chance final working examples for this topic?

Any FX matching with toonshading would be great...

I recall a test a long time ago where some did the puffy smoke that trails behind a rocket taking off. I think that was with sprites. High viscosity made them stay where they were spit out.


But you want the fire? How about a volumetric effect set to cone shape?

Can you show an example of something that looks like what you want?