A PC computer with high-end graphic capabilities and an Intel Core 2 Quad processor was used. As navigation and interaction devices, a Wiimote remote control and a wireless receiver bar were used. The visual and audio displays consisted of a methacrylate screen (4 3 m), an HD video-projector with a resolution of 1280 x 720 pixels at 1400 lumens, and a 5.1 surround-sound system.