[HolyGrail]

Ok, here you go , there is a lot of issues with it , plus it's only possible in 3D with white smoketrail for planes like Machi that are using white smoketrail and there is still some small balls effect at the beginning of the smoketrail leaving the guns .
It's not much practical thing to do due to game engine limits .
Gray smoketrails don't even have 3D support .
This example is from Machi gun blast , clearly you can see 3D smoketrail :lol:

Alpha Stage