To prepare for his role as cult leader Simon Leach, Bill Oberst Jr. studied the vocal patterns of Powers Boothe's 1980 Emmy-Award winning performance as Jim Jones in the TV-movie Guyana Tragedy, finding Booth's impersonation of Jones' voice more powerful than tapes of the real Jones.
Usually gregarious on sets, actor Bill Oberst Jr. lived in isolation during filming of his role as cult leader Simon Leach, with no internet or phone access, speaking little except on camera and retreating to Leach's office set in between takes.
The film originally had a wraparound segment in which the "footage" was being screened by a documentary filmmaker to a London audience. These scenes were filmed but later cut from the film.
Director Jourdan McClure and writer Ryan Finnerty told the German site HorrorBug that many of the film's most disturbing scenes were not in the original screenplay.
Though a full script was written, many of the scenes were improvised based on prompts given by filmmakers Jourdan McClure and Ryan Finnerty.
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