The movie was inspired by such influences as (more artist images shared on ( https://roseconnollysite.wordpress.com/2017/02/13/assignment-2-jacobs-ladder-further-research/ );
Photographer Diane Arbus
Photographer Joel-Peter Witkin
According to director Adrian Lyne, the drug aspect of the story was inspired by the Martin Lee and Bruce Shlain book, “Acid Dreams: The CIA, LSD and Sixties Rebellion“. Lyne also says that many of the film’s ‘demons’ were intended to resemble thalidomide victims. https://roseconnollysite.wordpress.com/2017/02/13/assignment-2-jacobs-ladder-further-research/
Jacob’s ladder notably inspired the Silent hill
Jacob’s Ladder — The film has many settings in common with Silent Hill, such as the hospital and subway. In the first game, Harry Mason dies and everything was just a hallucination in the “bad ending”. In the second game, James Sunderland shares the initials of Jacob Singer and his jacket is very similar to Jacob’s U.S. Army jacket. There is also a “Lyne House Key” which refers to Adrian Lyne, director of Jacob’s Ladder. In the third game, Heather Mason must find the Bergen Street platform. There is a scene of Jacob, strapped to a gurney, going down a nightmarish hospital hall that is reminiscent of the scene in which James is wheeled through a hall on a gurney in Brookhaven Hospital. In the texture files, the same poster Jacob Singer sees in the subway can be found. Among other things, the “twitch” that many monsters do with their heads, one example being Valtiel, was inspired by the film. The hospital scene in the movie depicts a bicycle’s wheel turning by itself, similar to a wheelchair seen in Brookhaven’s basement by Heather or the wheelchair Harry sees in the alley in the first game. A few moments later, a humanoid is seen in a sort of frame/box, which has also been seen in the series, such as the corpses in Pyramid Head’s lair in the Labyrinth, and around bosses such as Mary and Abstract Daddy.