Trivia

The film was shot in a national park in Romania, and every set was designed by renowned production designer Jean-Vincent Puzos, and built from scratch.

Jesse Plemons was originally cast, but dropped out and was replaced by Christopher Abbott.

Vanessa Kirby (Tallie) had a sprained ankle during filming.

British composer Daniel Blumberg was commissioned to compose music for the film, he collaborated with avant-garde musicians including Peter Brötzmann, Josephine Foster and Steve Noble on the score, and enlisted Scott Walker producer Peter Walsh to co-produce.

Drama film based upon Jim Shepard's story of the same name.