Abstract: A system is described for registering and calibrating physical props in a stage use to present virtual reality (VR) experiences to players. The system comprises a scanner, a machine-based registrar, a pre-programmed VR experience, and a calibrator. The scanner scans the stage to identify physical props and their placements and orientations. The machine-based registrar registers physical props captured by the scan. The pre-programmed VR representation has predetermined places where VR objects are located, or at least perceived to be located to a player wearing a VR headset. The calibrator provides the operator with an image of the physical props overlayed with the VR representation, and signals when a physical prop is not accurately positioned and oriented. The system allows stage assemblers to visualize, and easily correct, any deviation of the physical props' locations and orientations from the predetermined places set forth in the pre-programmed VR representation.