Given enough input, it should be able to learn on it's own what a humanoid shape is to a human.
Was the This Person Does Not Exist-a.i. simply trained with pictures of human heads? As it seems to be quite capable of keeping many things apart that are commonly kept apart.
T Person DNE also centered all faces in exactly the same way, which makes it a lot easier to avoid e.g. adding a third eye (because there are only two positions where eyes appear in the training data.)
T Waifu DNE uses similarly centered and cropped portraits, which is why its output is consistently of higher quality than T Anime DNE.
Was the This Person Does Not Exist-a.i. simply trained with pictures of human heads? As it seems to be quite capable of keeping many things apart that are commonly kept apart.