Walter P. Martishius was an American production designer and art director known for his work on films such as Terminator 2: Judgment Day (1991), Demolition Man (1993), and The House with a Clock in Its Walls (2018). Over his 33-year career, Martishius was recognized for his romantic, futuristic, and embellished reality artistic styles, bringing scripts to life with his visual designs. He passed away unexpectedly while on a work assignment in Vancouver, British Columbia.