A method is disclosed that includes accessing a building information modeling database comprising building information data of a structure. A position of a head-mounted display device with respect to the structure may be tracked, with the head-mounted display device comprising an at least partially see-through display. In response to a portal user input, a world-locked holographic portal may be displayed via the device on a surface of the structure, where the portal comprises a world-locked holographic representation of a portion of the structure otherwise hidden from view by the surface. In response to an operation user input, a virtual operation is performed on the structure, and the building information modeling database is updated based on the virtual operation.