It seems like you can include negative prompts that the AI tries to avoid, and you can put in stuff like (extra limbs), (extra fingers) and so on.
At least that's what I saw with the amazing looking prompts at civitai.com
Example of a prompt:
modelshoot style, (extremely detailed CG unity 8k wallpaper), full shot body photo
of the most beautiful artwork in the world, medieval armor,
professional majestic oil painting by Ed Blinkey, Atey Ghailan, Studio
Ghibli, by Jeremy Mann, Greg Manchess, Antonio Moro, trending on
ArtStation, trending on CGSociety, Intricate, High Detail, Sharp focus,
dramatic, photorealistic painting art by midjourney and greg rutkowski
and a negative prompt(goes with the positive one):
canvas frame, cartoon, 3d, ((disfigured)), ((bad art)), ((deformed)),((extra
limbs)),((close up)),((b&w)), wierd colors, blurry,
(((duplicate))), ((morbid)), ((mutilated)), [out of frame], extra
fingers, mutated hands, ((poorly drawn hands)), ((poorly drawn face)),
(((mutation))), (((deformed))), ((ugly)), blurry, ((bad anatomy)),
(((bad proportions))), ((extra limbs)), cloned face, (((disfigured))),
out of frame, ugly, extra limbs, (bad anatomy), gross proportions,
(malformed limbs), ((missing arms)), ((missing legs)), (((extra arms))),
(((extra legs))), mutated hands, (fused fingers), (too many fingers),
(((long neck))), Photoshop, video game, ugly, tiling, poorly drawn
hands, poorly drawn feet, poorly drawn face, out of frame, mutation,
mutated, extra limbs, extra legs, extra arms, disfigured, deformed,
cross-eye, body out of frame, blurry, bad art, bad anatomy, 3d render
and it produced this:
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