Photographer Robert Mitchell (see bio below) came up with a clever solution for creating an almost infinite amount of backgrounds using nothing more than a wall and a bucket of paint. While painting and repainting takes some time, the results definitely justify the effort.
Every photographer that builds a studio or converts a room for use as a photo studio gives thought to backgrounds and backdrops. Seamless paper is available in a few widths and a multitude of colors but it’s not always interesting or appropriate and depending on what you’re shooting, seamless can be boring and ugly. The paper itself doesn’t cost that much and you can rig things to hold a roll without any serious investment in hardware, and for some, this is more than enough, and everything they need.