Boston, Massachusetts USA, April 24-28, 1994
There are two aspects to the new technique. First, in contrast to normal practice, the tracking symbol is a volume rather than a point. Second, the surface of this volume is semi-transparent, thereby affording occlusion cues during target acquisition.
The experiment shows that the volume/occlusion cues were effective in both monocular and stereoscopic condistions. For some tasks where stereoscopic presentation is unavailable or infeasible, ther new technique offers an effective alternative.
Full copy in postscript
Live demo in mpeg