APPARATUS FOR RECORDING, TRANSMITTING OR REPRODUCING VIRTUAL REALITY IMAGES AND SOUND, NAMELY, COMPUTERS AND OPERATING SOFTWARE FOR VIRTUAL REALITY PRODUCTION AND VISUALIZATION, AND PROJECTION SCREENS; APPARATUS AND INSTALLATIONS FOR SPATIAL REPRODUCTION OF VIRTUAL REALITY IMAGES AND SOUND, NAMELY, PROJECTION SCREENS AND DISPLAY WALLS; AND VIRTUAL REALITY COMPUTER HARDWARE FOR CONSTRUCTING VIRTUAL REALITY ROOMS; VIRTUAL REALITY DATA PROCESSING EQUIPMENT, NAMELY, COMPUTERS; SOFTWARE STORED ON ...