The image version of that annoying em-dash thing where people pick up on the fact that LLMs tend to overuse em-dashes and start accusing everyone who knows how to typeset of being a robot, largely because that's the sort of writing the plausible-deniability-plagiarism-machine was trained on is the fact that basically every picture that have soft backlighting going on looks like AI.

Like, I took this picture of my brothers cat with my phone myself and I still think it looks AI-generated.