My method, in photoshop, would be to first select the lips, then copy it to a new layer right on top of the "original" lips, from there I can mix the hue and saturation settings, brightness and contrasts and so forth, another good thing of this is that I can alter the opacity of the layer as well, which can produce nice results and sometimes help realism.Darth Wong wrote:The picture on the left is raw; the picture on the right has been altered with the local "colorize" function to give her digital red lipstick. I am not really an expert with digital photo manipulation, but I was quite pleased with the result. Free-hand painting on top of digital images tends to look like shit, but simple colour alteration works really well.
I can also have several layers with various colors and choose which one I like best.