I have one called FaceGen that changes just the face, but they omit hair entirely, and make the eyes look weird, and no cosmetics - just skin tone and bone structure.

Photoshop lets you do anything, but not in an easy way.

The GOAL is, to show someone what they COULD look like by using just a minimal amount of cosmetics and changing hair style, etc. That would save a massive amount of time and money spent on cosmetics and stuff.

Just a different hairstyle and a tiny bit of makeup around the eyes can change one's appearance in a massive way. For instance, this one Chaturbate performer looks like crap without any makeup because he has no visible eyelashes. Just a tiny bit of eyeliner makes him look 10 times better.