There has been yes, but it doesn’t mean it’s the right ruling law. The law varies on that by jurisdiction as well because it is a murky area.
Edit: in the USA it might not even be illegal unless there was intent to distribute
By the statute’s own terms, the law does not make all fictional child pornography illegal, only that found to be obscene or lacking in serious value. The mere possession of said images is not a violation of the law unless it can be proven that they were transmitted through a common carrier, such as the mail or the Internet, transported across state lines, or of an amount that showed intent to distribute.[
So local AI generating fictional material that is not distributed may be okay federally in the USA.
Serious value? How does one legally argue that their AI-generated child porn stash has “serious value” so they they don’t get incarcerated.
Laws are weird.
Have the AI try to recreate existing CP already deemed to have serious value and then have all the prompts/variations leading up to the closest match as part of an exhibit.
Edit: I should add, don’t try this at home, they’ll still probably say it has no value and throw you in jail.