Question: How do industries/communities KNOW that images were done via AI?

I'm really curious as to whether the actual image files themselves have metadata or embedded code to serve as a signature for a specific AI.

Otherwise, isn't knowing AI-gen from human after seeing just the resultant 2d image a very subjective thing?

I'm coming at this, primarily, from the angle of the TTRPG hobby, where some folks are pretty "torches and pitchforks" about the topic.

I realize that some AI-gen art is obvious (yes, yes the hands...) but I'm startled …

code coming communities embedded files gen human image images industries isn metadata privacy question signature