The additional software-generated images with the virtual scene typically enhance how the real surroundings look in some way.
Some AR systems use a camera to capture the user's surroundings or some type of display screen which the user looks at (e.g., Microsoft's Holo Lens, Magic Leap).
describes a goggle-based virtual reality system with holographic recording of fictional experiences, including smell and touch.Morton Heilig wrote in the 1950s of an "Experience Theatre" that could encompass all the senses in an effective manner, thus drawing the viewer into the onscreen activity.The consortium subsequently developed X3D from the VRML framework as an archival, open-source standard for web-based distribution of VR content.All modern VR displays are based on technology developed for smartphones including: gyroscopes and motion sensors for tracking head, hand, and body positions; small HD screens for stereoscopic displays; and small, lightweight and fast processors.Paramount for the sensation of immersion into virtual reality are a high frame rate (at least 95 fps), as well as a low latency.
Furthermore, a pixel persistence lower than 3 ms is required, because if not, users will feel sick when moving their head around.
This tactile information is generally known as force feedback in medical, video gaming and military training applications.
Virtual reality also refers to remote communication environments which provide a virtual presence of users with through telepresence and telexistence or the use of a virtual artifact (VA).
In 1938, Antonin Artaud described the illusory nature of characters and objects in the theatre as "la réalité virtuelle" in a collection of essays, Le Théâtre et son double.
The English translation of this book, published in 1958 as The Theater and its Double, is the earliest published use of the term "virtual reality".
These components led to relative affordability for independent VR developers, and lead to the 2012 Oculus Rift kickstarter offering the first independently developed VR headset.