Douglas Hall's house has been seen on film before as the apartment of Detective Deckard in Ridley Scott's 1982 Blade Runner (1982). as well as the apartment of a drug lord in Predator 2 (1990). It's a Frank Lloyd Wright building named Ennis House, located in Los Angeles, CA.
The science fiction novel "Simulacron-3" was also published under the title "Counterfeit World," and was first published in 1964 by Daniel F. Galouye in the United States, making it one of the first literary descriptions of 'virtual reality.'
Vincent D'Onofrio said that the theme of the movie was about wanting something that you couldn't have.
While the movie was a box office bomb, its theme song 'Join Me in Death' (or simply'Join Me' in the U.S.) by HIM became a world wide smash hit.