Why is it that AIs struggle so much with fingers? Is it the high degrees of freedom in space hands have?
A couple reasons, IMO.
First, hands are just super complex in the first place; it's why they're also hard for humans to draw. The geometry is super complex—there are tons of bones and tendons, they move in a million different ways, and they look completely different at different angles.
It also has to do with how AI works. It has to extrapolate information from a vast data set, and with all that hand complexity we were just talking about, the AI can't get "consensus" on what hands are supposed to look like. So, it does its best and it averages out all the different possibilities. That works with a palm tree—its not important if that has 20 fronds or 25—but it has no way of knowing that it IS important for there to be 4 fingers and a thumb on each hand.
3/4 of your fingers have another finger to the right. That's one reason why AIs sometimes go overboard with hands. 75% of the time that it draws a finger, it thinks, "alright, now another finger to the right of that one..."
Nice!
How do you get it to keep the same "person"? That's something I struggle with even with non-porn.
I referenced a real person that not many people were likely to know: Georgia Ellenwood. That's kind of a gray area. It's not illegal, but you could say it's nonconsensual, which isn't good either. Although some people do deepfake celebrities, my intent wasn't to imitate her exactly, but rather to use that prompt as a way of styling the type of person. Since it isn't really an accurate likeness of her, I felt comfortable posting it.