Thank you. This is a fascinating subject. You can really see it in sculpture. When you study art, it's shocking to see how shriveled and lifeless a plaster cast of a person is, even though it's an exact representation of form, down to the level of pores in the skin. Yet, a plaster cast of a face looks like it's in 3/4 scale. If you hold the cast next to a marble sculpture, you see why. A supposedly 'realistic' sculpture from, say, the 19th C, is immediately seen to be extremely exaggerated, compared to the exactly accurate casting. Yet you don't normally see it as such. This is because the sculptor is making up with form alone for all of the contributions that color, moisture (eyes,) and the minute, intricate movements of the face that make to one's appearance. Unlike paint, when seen up close, skin has no particular color---it is a hundred colors, combined with a deep translucence that gives sub-surface scattering of light. Moreover it constantly flushes and pales, and blood vessels are faintly visible below the surface. Minute hairs also change what you see depending upon your eye's angle to each specific point. You don't see any of that from more than a few feet away, which is where paint comes into its own. You also don't see a lot of even in close-up photos because they are static.