Cheers Maze. As to whether it's a concrete wall etc, it's just a backdrop, I hadn't really considered whether it was to represent an actual surface. I've got plenty of time now to finalize presentation so I'll take your suggestions into account.
dont cover the spokes as much and maybe scale down the fire at the lower part of the wheel. some small leftover flames from molten rubber sitting on the concrete and forming a trace might be dandy as well. other than that it has come a long way!
hi man, fire looks way better, but background is still way too dark. Also the scale of dirt is a little too big for me. Maybe try lowering dirt opacity. Is it supposed to be a concrete wall or a metal surface? maybe carving the skullhead as if it was welded to the wall can be cool, also the white stripe a bit too purplish…