It's hard to learn high frequency gradients. It's easy to learn a single edge, but not a large pile of overlapping gradients like the ends of hair. I don't kno

It's hard to learn high frequency gradients. It's easy to learn a single edge, but not a large pile of overlapping gradients like the ends of hair. I don't know why it's so common to have an arbitrary nonsense "sticker" on a face though, I wonder if it's because input photos were trunacted at edges and the learner tried to model the edge as a facial feature instead of pruning it's knowledge to a safe interior of the photo.