Detectable pattern in thispersondoesnotexist images

I’ve been amused by thispersondoesnotexist for years; it (StyleGAN2) can generate (relatively) photo-realistic images of faces of people who, well, do not exist. There is a lot to discuss about this, but for now, I’d like to point out an easy way to detect if a photo was generated by it. It’s actually quite obvious once you see it. I noticed it by accident a while back when I was scrolling through a folder of images from the site and saw something unusual. See if you can notice it.

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