Richard Jay Silverthorn, who plays Lucifer in the film, also did the makeup work on the film. Later Silverthorn would also write a published novelization of Fear No Evil.
Painted cornflakes were used for zombie makeup.
The films origin came about when producer Charles M. LaLoggia discovered the filming location of the Boldt Castle in Alexandria Bay, New York. LaLoggia thought it was an ideal place to set a horror film and approached his cousin director Frank LaLoggia to write a film around the location.
Fred Goodich's cinematography in the film was stylized after many medieval paintings, also those of Rembrandt.
Frank LaLoggia was strongly opposed to having zombies included in the film, but producer Charles M. LaLoggia insisted on having zombies in the film since zombie movies were popular at the time.