There is a montage of 19th century newspapers regarding the Rosewood Institute and female psychological healthcare. There's several pictures of naked women, showing breasts, buttocks and vaginas ranging from full rear nudity to partial and full frontal nudity.
We see a woman chained from the ceiling at the wrists who has been stripped to the waist, her breasts are visible.
Several instances of female breast nudity, a couple of vaginas, and two female butts. No male nudity; however, there is a man in a thong.
There's a scene where Isabel is chained up, and the back of her gown is opened for her to be beaten (see Violence and Gore for more info). For a brief second, you can see most of her bare butt.
During a scene where Isabel is whipping another woman (see Violence and Gore for more info), there are several topless women surrounding the woman being beaten. Sometimes you can clearly see the nipples, but for the most part it's pretty obscured.
There's a scene where two cultists sneak away for the man to feed the woman some sort of feast. Both are wearing very little. The woman's breasts are visible, and the man can be seen in a thong.
A man sneaks into a party where there are naked women. Most of the nudity is in the form of female breasts, but there's one vagina and butt in there.
Full frontal and full back nudity of Isabel during a ritual. The scene lasts about 2 minutes.