[Scion9066]

The EFF's post about it at each of the three steps of obtaining, training, and generating an output image: https://www.eff.org/deeplinks/2023/04/how-we-think-about-cop...

It's an interesting read and makes a good case for why none of the steps are directly copyright infringement, even if you can prompt the output to be (and in that case the person doing the prompting should be the one at fault, same as someone drawing something infringing directly).