This patent provides a method for performing enhanced viewing strategies available to a user wearing a head display unit with position and orientation tracking. Stereoscopic rendering is performed at a set of time points. A set of viewing parameters including position data and orientation data of said head display unit is stored in conjunction with time data. A process called recall rendering is performed and the stored parameters which will allow stereoscopic display of the volume along with the orientation data and position data of the head display unit.
Method and apparatus for recall volume rendering