the virtual boy console was the first video game console that was supposed to be capable of displaying "true 3d graphics" out of the box, in a form of virtual reality. whereas most video games use monocular cues to achieve the illusion of three dimensions on a two-dimensional screen, the virtual boy creates an illusion of depth through the effect known as parallax. in a manner similar to using a head-mounted display, the user looks into an eyepiece made of neoprene on the front of the machine, and then an eyeglass-style projector allows viewing of the monochromatic (in this case, red) image.