FogScreen is a new invention which makes objects seem to appear and move in thin air. Believe. The FogScreen is created with a suspensible device, there is no frame around the screen. The installation is easy: just replace the conventional screen with FogScreen.  You don√Ǭ¥t need to change anything else - it works with standard video projectors. With FogScreen you can create a walk-thru wall, or a door you don√Ǭ¥t need to open.  The viewer can walk through the screen √¢‚Ǩ‚Äú walk directly into the images, and through them! People and things can be brought into view through the screen. The fog we are using is dry, so it doesn't make you wet even if you stay under the FogScreen device for a long time.  The fog is made of ordinary water with no chemicals whatsoever. With two projectors, you can project different images on both sides of the screen. Some more discussion here.