Virtual Reality (“VR”) is a general definition used for 3D media that allows living the experience of “being there”. People in the VR technology participate in virtual medium through such elements as virtual reality goggles or helmet-mounted displays. After getting involved in such medium, anybody losing contact with the real environment feels like being completely inside it. The reality feeling created on people by VR works varies depending on the intensity of the reality used in relevant application. Virtual reality works eliminating spatial limitations are special applications.