I saw a picture once of a person who took a real screen shot from Aces High, touched it up so well it had the distinction of real life. He placed real clouds in the background and touched up the skins of the P-51D so they glistened in the sun. Then edited the pilots to make them look realistic, and then gave the bombers being attacked by the P-51's in the background a good face-lift.
It was incredible, not one detail missed, you did not see any "video game graphics" in it, it truly was "real life".