Earty applications using the technology common in VE systems today allowed the user to have a relatively passive experience. Users could watch a pre-recorded film while wearing a head-mounted display(HMD). They would sit in motion chair and watch the film as the system subjected them to various stimuli, such s blowing air on them to simulate wind, While users felt a sense of immersion, interactivity was limited to shifting their point of view by looking around. Their path was pre-determined and unalterable