Models seem to have very interesting blind spots. While https://assbench.com/ may seem like a joke, the results are very illuminating. One might expect far better results given the detailed prompt, allowance for render checks and iteration, the number of human figures the models are trained on, and clarity of tool use (threejs).

However, result quality really drops off once you get out of the top 5 or so.

(NSFW note: all buttocks are covered by fairly conservative bikini bottoms and show no genitals, bulges, etc.)