This is after up-rezing the sim - and simply playblasting it.
I can’t seem to work out why, but when pumped through mental ray the sim is somewhat smoothed out - I’m not sure if it’s a lighting, texturing, or rendering parameter issue so I’m just dealing in playblasts at the moment.
The main critique I’ve had is that it seems to fast - it doesn’t dissipate properly at the end, sort of like it’s moving into some sort of gradient mask of transparency.
The next tests play around with bouyancy, twist, swirl, and fuel to try and see if it helps at all.