Apple's first published ML paper was on using GANs to make synthetic datasets more realistic. They applied their approach to computer-generated eyeballs to add

Apple's first published ML paper was on using GANs to make synthetic datasets more realistic. They applied their approach to computer-generated eyeballs to add sensor-like noise. I find it interesting that the paper was published before Face ID was announced, since in retrospect it's clear that's what they were working on. That paper also mentions something that has still not found its way into an Apple product: they posed 3D models of hands and then degraded them to appear as depth maps, with jagged edges, artifacts, and occlusions. https://machinelearning.apple.com/research/gan https://machinelearning.apple.com/research/gan