Douglas Hall's house has been seen on film before as the apartment of Detective Deckard in Ridley Scott's 1982 Blade Runner (1982). 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, it was first published in 1964 by Daniel F. Galouye in the United States, and is one of the first literary descriptions of virtual reality.
There are several references that the song "Timewave Zero" by Grendel used from this movie. One example is the quote "They think, they work, they eat.";"They fuck." in the dialogue between Whitney and detective McBain. Also, in the dialogue between Ashton and Douglas near the end, when Ashton switched with Whitney: Ashton said: "What did you do to the world?" "Turned it off." "Then put it back!". These are the same lines as in the beginning of Timewave Zero.