Go back to life incandescence ramp. It should look like this. Note that ramp is using only flat colors. But what if we could map texture to each of these colors?

Of course we can do that. Remember In Maya you can map texture to everything

So create solidFractal and Stucco textures. Refer to Lava shader tutorial to see how to make it look like fire. Map solid fractal to first color of ramp (just MMB drag texture to color in the ramp). For second color use stucco with shaker set to 30 or 40 and map one color with fractal from first color. Third color of the ramp should be black. Also it’s good idea to map color attribute of particle shader to fractal texture with small color gain. I do this just to get little color variations.

So from now it’s all tweaking. So tweak!