The building doubling for the abandoned hospital is a local high school where the production team were allowed to film at night.
The director said some of his inspirations for the movie were Thirteen Ghosts (2001), The Conjuring and Michael Jackson's Thriller.
The VFX, editing and color grading were done by the director, as the band had a very limited budget for the directors vision.
The movie was shot entirely on Samsung S10 smartphone using FilmicPro and a DJI Osmo Mobile stabilizer.
The temp music used in the movie is from Danny Elfman's Sleepy Hollow score, as well as Nicholas Pike's Ghosts score.