I originally figured it was just some landmark-based filtering/graphics tricks like most of the other filters, but looking at people’s selfies a bit closer, there seem to be a lot of GAN-like generative artifacts (especially in the hair) that I feel wouldn’t be there if it is just a graphics effect:

https://twitter.com/Midbeast/status/1126769681312862208

If it is a GAN, I have no idea how they would do it in real time, though. Thoughts?