Bruh, actually watch the gif the dude posted and you'll see the blatant shift in 'art style' specifically on the last frame. Unless you mean to tell me part of their evolving art style is randomly deciding to make frames of their animation have that textbook 'sheen' of AI generated images, or just generally look noticeably different from every other frame of an animation, I feel like the use of AI is apparent enough.You don't think the simpler reason of Nitrolith improving his art style over the long development is more likely? It has been almost 3 years since he first release the game.
Also wow only 3 years? It feels longer not sure why.
I actually haven't played this game in a while so not aware of how often this thing pops up/ if it pops up in other instances but if an artist is going to use AI to generate or "enhance" their images they should be forthcoming about it, which I don't think I've seen any such info from the artist