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This article introduces two new technology developments in the field of virtual model displays (VMD). Projection-based stereo systems have typically only been able to produce a single head-tracked image and have been constrained to non-adjustable surfaces.The first new technology, the Duo, allows two simultaneous and individually head-tracked stereo pairs to be displayed. This brings the virtual models to life, as two people can now share the workspace by pointing at the model and sharing virtual props to manipulate the model just as if it were sitting in front of them. The motion of either viewer does not impact the view of the other.The second new development in the field of VMDs is the ability to adjust the angle of the projection surface to provide a natural workspace depending on the application and associated virtual models.