121" Diagonal Rear Projection Material Rear Projection Screen (108" x 55") Rear Projection Screen Material, also known as Rear Projection Film, is the perfect surface to use when you wish to place your projection equipment behind the screen. Your DIY Rear Projection Screen is a high-tech product which features a natural and clear image and works best in a dark setting where ambient light is controlled This translucent screen surface allows the image to pass through the screen. The translucent gray screen works best with a bright projector (2,000+ lumens). Rear Projector Material is best for a fixed frame where it will be stretched evenly to a frame in all four directions. You should project onto the smooth side of your Rear Projection Film.