Then I just apply flood fills to the requisite areas of the picture to color it in, and voila! When I add backgrounds, I usually take them from video games starring the character on display -- I screencap the scenes with an emulator program and, after blowing up the images as necessary, place them in the background of the layered image in which my character drawing is the foreground. And then sometimes I'll add a glow effect to the character or blur the background, as seen above.