Characteristics of the Retroreflective Material The material needs to be mounted in a pattern that will not show up when an image is projected on it. Hexagonal and diamond patterns have been used successfully. On small screens, the straight 3-foot widths with back-beveled cut edges to allow seamless overlap have been used successfully. This needs to be done in completely clean conditions, with white gloves and no oil.Set Lighting Conditions Although small projection systems on cranes have been used, they need to stay parallel to the screen axis or the image will start to fade. In the lighting setup of the actors or objects, all lights need to be blocked from hitting the screen or they will gray the image.Camera-Mounted Light Source Various light sources, including LED (light-emitting diode) rings, can be placed around the camera lens to light up (with a blue or green source of light) a screen. If using a projector source, this requires a beamsplitter, generally 50/50 in transparency, with antireflection coatings. If there is any camera movement, the projector and beamsplitters must all move together and stay parallel to the screen.