Images move with and surround the viewer creating an immersive environment. Stereo projections create 3D images that appear to have a presence both inside and outside the projection-room continuously. Therefore, 3D images constantly appear both inside and outside the projection-room. The position of the users in the CAVE are calculated from the head tracker attached to the lightweight liquid crystal shutter glasses. This special glass enables users to see the stereo images move with and surround them.
Users interact with the graphics environments with a hand-held device called the wand .
The ImmersaDesk is a 5' x 4' screen, tilted at 45 degrees. However, an ImmersaDesk requires less hardware configurations than the CAVE and therefore greater in mobility and maintenance. A SGI graphics computer generates stereo images which are then rear-projected to the screen. The CAVE Simulator run on SGI workstations. Three-Dimensional environment is displayed in a normal window on the monitor screen, and shows the CAVE, the wand, and the simulated user.