Since I wasn't particularly happy, with the generated fire, I tweaked around with it a bit this morning and got a new result, which I love much more. The size of the flame can be set at will and the flame is more realistic in many ways, other than that, it suits better with the overall graphics.
As you can see, the result is quite different from the previous version, the shape of the flames is different and their texture is much better also. Who ever said that nothing good ever comes from playing with fire? =D
I generated larger flames just to show off a bit:
Has "pixel art" ever been so simple and kind when dealing with fire!?