asked how I do the fire effect that you can see herejack-a-lynn.deviantart.com/art…
WHAT YOU NEEDThe Program Paint Tool Sai and a Graphic Tablet
Of course you can change the colours of the layers, play with the colours. Often there is a better effect in the end if you're brave enough to do experiments! :3
If there is a finished background you may just need one layer ABOVE the background with luminosity.