TikTok's new face filters are alarmingly good -- which could be pretty bad - The Verge

"Simply put, GANs pit two competing neural networks against each other in a fist-fight to the death," Hurd says. In the case of Bold Glamour, it's a competition between the camera's view of your face and the style TikTok wants to morph you into. "Because it uses you, it then compares aspects of your face to a dataset of images that start to match against your cheeks, eyes, eyebrows, lips, and more." Eventually, the technology combines the two sets of images into one. "If we do this fast enough, we can achieve a video framerate," Hurd says.