Laura Bilgeri shows her ass in two scenes at the end of the movie. One when being pulled out of an alien pool and the other when she wakes up naked in the woods.
Jessica Madsen shows a bit of butt in a sex scene while on top. Her breasts are visible, but not really as they are covered with horror effects makeup.
Jennifer Lawrence’s breasts are seen when people pull down her shirt showing her breasts.
Tatiana Maslany shows a bit of ass and a bit of breast in a sex scene. The very top of her ass can be seen at the start and her left breasts is seen a few times throughout.