Ah the classics! Your stule seems to be developing into a painting style. To blend the hero and the background together better I would apply a "artistic" (in photoshop or whatever the equivalent is in the program you are using)filter. Conversely you could reduce the opacity of the flames so that the give a more realistic look.
Parece que voce pintou e n?o uma manip. galeria errada, mas ficou bom. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Google translate --> 'seems to paint, not manips. wrong gallery, but was very good.