The Backrooms Concept: The Backrooms are described as a vast, seemingly endless set of rooms, hallways, and corridors, all filled with the constant hum of fluorescent lights and an uncomfortably monotonous yellow wallpaper. The idea is that if you're unlucky enough, you might "noclip" (a term borrowed from video games where you pass through solid objects or Backrooms walls) out of reality and end up in the Backrooms.