Ahh so glad you like it man! I cant stop doing them I'm actually making another right now hahaha. But yeh just render up some apo flames, I use the spherical setting, that one gives best nebula-like results, you kind of have to be patient though, I have like 1/3 chances of getting good ones... so yeh, just render up like 3 of the same color, layer them and try different blending modes... once you get something cool, then merge them together and begin your sharpening, dodging, cloning etc... good luck m8