Fan Casting Backrooms

On May 12, 2019, an anonymous user started a thread on /x/, 4chan's paranormal-themed board, asking users to "post disquieting images that just feel 'off'".[1][2] One of the posts was the original photo of the Backrooms: a picture of a large carpeted, open room with yellow wallpaper and fluorescent lighting on a Dutch angle.[3] It is not known where the photo was taken,[4] but it appeared in an earlier thread on April 21, 2018.