What I really like about decals are the fx shaders.
The fx shaders come in handy in very different situations, ie. I can texture my mesh with a video texture.
So, I think the best move is to forget the old GG decals, and look at the FX shaders, and the great help it is in the game.
I plan to combine particles with decals when needed, but mostly 3d particles, even to make fire effects.
As Amen said, a real campfire just thrown some flames when starting, then becomes like embers, most than big flames.
@ TGC, just back the FX shaders, and we will go the rest.

GGMax shaders are non-friendly editable, so FX, please.

Laptop: Lenovo - Intel(R) Celeron(R) CPU 1005M @ 1.90GHz
OS: Windows 10 (64) - Ram: 4 gb - Hd: 283 gb - Video card: Intel(R) HD Graphics
cpu mark: 10396.6
2d graphics mark: 947.9
3d graphics mark: 8310.9
memory mark 2584.8
Disk mark: 1146.3
Passmark rating: 3662.4