This is from when I first experimented with models based on Stable Diffusion 2.0. The model is called “Realism Engine Meets Waifu Diffusion” or something like that, but it doesn’t seem to be being distributed anymore. IIRC it’s a merge between Realistic Vision, which doesn’t generate NSFW content, and Waifu Diffusion, which I believe was fine-tuned on hentai and no realistic nudity. As a result, while it will generate nudes that look like photographs, it has no idea how to draw genitalia. It makes me think of exported hentai where they never bothered to draw in the genitals because it was going to be censored anyway, but then the exported version isn’t censored, so there’s just nothing there.

Generation info:

portrait of a beautiful nude sexy French woman in Caribbean restaurant , squatting position, symmetrical face, lighting , Barren atmosphere, sharp eyes, crotch, anus Negative prompt: 3d render, cgi, painting, drawing, cartoon, anime, arms in front of crotch, panties Steps: 30, Sampler: DDIM, CFG scale: 7, Seed: 1437313006, Size: 768x1024, Model hash: 18befb1226, Model: realismEngineMeet_v10, Clip skip: 2, ENSD: 31337