Great tutorial, but if I just want to change someone's mouth (lips) cause they were sucked in. So I'm going to change their mouth (Lips) out with another mouth (lips) shot. So can I do the same technique without doing the whole face? Or it will be better to do the whole face?
Good technique, but the result shows that it is important that the two photos be taken from roughly the same distance from the model. The new face seems to have been shot much closer, resulting in artificial perspective of the features.