[sawwit]

I somehow doubt that this is just a photo stylized by a computer. Aren't the eyes way out of proportion? http://turing.deepart.io/f/0.png

[alphapapa]

Yes, exactly. While the background in the picture of the baseball player doesn't look photographic, at least the proportions are realistic. But the proportions of the female face are completely unrealistic. How could it be based on a photograph of a real human?

Are these computer-generated images based on photographs of real subjects, or on photographs of stylized paintings?

I don't think this test is very interesting until we can see the images the computer-generated ones were based on.