I already told you: AI steals from post-processed photos and 3D renders. This is why it's often really good at colors/gradients, but produces the weird light that looks like inbreed between 2D and 3D.
2D artist cannot replicate that. They work with limited color pallet, not entire RGB range. Stylized 2D art also has completely differnt range of post-processing effects that can be used, so you can't really replicate it.
"LUT" is literally one google away from explanation, while "uncanny valley" is a common English phrase. You're not my audience, and I'm not wasting my time to explain every single little thing to someone who only wants to get mad on the internet instead of learn.
What kind of AI I'm talking about? Dunno, you didn't specify either despite starting the discussion, just said bunch of words like "art" just like me.
Last time I checked, one of main supporting characters in DOOM (2016) and Eternal is VEGA. Guess that the life lesson from this arcade gore shooter is that we should leave all of our facilities under control of AI, listen to it's directives, and keep the pesky human scientists on tight leash (especially the ones without organic body).
Dude, you crawled back to the discussion after blocking me, saw my edit, and unblocked me just to post a giant wall of internet expert. I don't think this can get any more Reddit than that.