Filmed in three different countries, mostly while the filmmakers were on vacation. The primary location of the Loft was an AirBNB in Rome; the keypad was in England; and the shower was shot in Toronto, Canada.
Apart from a few inserts that were captured later, majority of the film was shot in 2 hours with no lighting, sound equipment, or script. Shooting in black and white was done to hide the inconsistencies in lighting.