I really need such fire as you see on the image for many things, air units, rocket boots. Can someone do that small thing ? Make the smoke very transparent and to be like a tail of the fire you know like every effect with a 'tail' the tail weaves behind the fire so if your unit turns a direction the smoke pattern will also look curved if forward - the smoke will leave a long trail. Btw if the fire looks too big, no just make small fire coming out of the engines and LONG smoke (transparent smoke not thick) path. I need it to attach to some planes too.