Impossible. There is no accurate way to determine age by external appearance. For example a 15 year could look older than an 18 year old.

That doesn't stop law makers from trying. Like the mess over small-breasted porn being banned in Australia in 2010:

> While the ACB claims that there is no blanket ban on small breasts as such, women over the age of 18 with small breasts who might look young ARE banned.

http://www.inquisitr.com/59633/australian-government-censor-...

Yeah but Australia doesn't really have protected speech per se. Different legal system.

Australia doesn't technically have "freedom of speech" as America or other countries may have.

If it's being generated no characters actually have an age.

Any that are plausibly adults would presumably be legally in the clear.

Incidentally, that's almost exactly how generative adversarial networks work.

To generate realistic images, you make two neural networks: one of them (D) takes an image as input and decides whether it's real or whether it's the output of (G). The other (G) takes random noise as input and turns it into an image that will fool the (D) network.

Make them fight until they both get strong, and then use (G) as the final model.

Surely you would just filter on the input?

Maybe, it seems like there might be ways to work around an input filter though.