page_title: MotionParallax3D
section_title: The Place of MotionParallax3D displays among VR systems
hierarchical_section_title: MotionParallax3D / The Place of MotionParallax3D displays among VR systems
caption_attribution_description: English: NettleBox virtual reality display
context_page_description: The MotionParallax3D displays are a class of virtual reality devices that create the illusion of volumetric objects by displaying a projection of a virtual object generated to match the viewer's position relative to the screen.
context_section_description: Currently all widely used computer virtual reality devices can be divided into two classes:
  MotionParallax3D displays
  HMD (head-mounted display) displays.
  In addition to these two classes there are other more exotic variants: e.g. the CastAR system, under development, in which the projection of the correct image onto a surface is achieved by placing the projectors directly on the glasses. However such devices are not so widespread at the moment and exist only as prototypes.
  Head-mounted displays usually isolate users from the real world, whereas MotionParallax3D displays allow users to keep their orientation in the environment. This also imposes restrictions on MotionParallax3D displays; since the user sees both real and virtual objects, it is necessary to make their behavior identical which is achieved by reducing latency to an acceptable level (no more than 20 ms).
caption: NettleBox virtual reality display
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