One of the most prominent generative AI tools that has been making headlines in the last few months. Stable Diffusion is specifically meant to create fully artificial, photo-realistic images. If you've ever seen one of those "all of these people don't exist" montages, it was almost certainly using images generated by this tool.
There's a ton of models and LoRa's for it that can create a pretty wide variety of things. I use it for creating on-the-fly watercolor scenes during D&D sessions for my session journal.
These were deities for a homebrew campaign, and the DM had already provided their domain, element, and symbol (i.e. war, fire, stallion). I usually just generate 4 images at a time (only takes a few seconds on a 3090) and pick the one I like the best. Sometimes I'll generate 2-3 sets of 4, but not often if I don't have a clear idea of exactly what I'm looking for.
If it's something really specific I need, I could spend hours using in painting and various noise/models to get what I want.
The previous linked image was much the same process, though the prompts were more detailed as the other players had provided more information on their character's appearance.
Which in a weird way is an ethical way to make porn with no "exploitation" involved with the process and there will always be a market for the "real" thing for the market. Now the AI art people can be incredibly thirsty but I do feel it is a bit reductive to say its mostly only for porn when the applications of it can be quite useful especially for hobbyists (who I feel aren't profiting solely on those creations). I see great use for generative "art" for tabletop in terms of character sheets/custom monsters/settings/ and even maps. AI art isn't necessarily a bad thing its just the fear of what large corporations will do with it that is really the scary part (also bullshit scammers who steal X artists work and try to resell it as that artist)