Systems and methods for calibrating a three dimensional (3D) stereoscopic display system may include rendering a virtual model on a display of a 3D stereoscopic display system that may include a substantially horizontal display. The virtual model may be geometrically similar to a physical object placed at a location on the display. A vertex of the virtual model may be adjusted in response to user input. The adjustment may be such that the vertex of the virtual model is substantially coincident with a corresponding vertex of the physical object.