Yes, some of the refs are partially AI-generated and were severely edited.
I don't mind to place AI tag, it doesn't make any difference, but:
It is the same as if I would use someone's work and reworked it to the extent that it is not considered as a plagiarism. So, in that case, I wouldn't need to credit the author, and my work would be original. So, if the author of the original reference images was an AI, should I credit it? And why, if you can't prove that it was created by the AI and no one can make any legal claims etc.? It was reworked twice and doesn't remind the original AI-generated image.
Again, I don't mind placing a tag, and I'm not trying to start a holy war or something, but this is the question we need to start to raise at this very moment. Couple of years and everything will be created with AI at some extent.
Like, you take some reference image from Google, and then repaint it, and it just happens to be AI-generated. Do you need a tag? Or, you ask chatGPT to make you a story for your game. Do you need a tag? Or you're just using Copilot for coding. Do you need a tag? And if you don't, why is that? And if you do, where's the line?
Just asking some questions. It will be very important in the near future, when everything goes to s.