Mr. Townes is very skillful in the CAD software. At the appointed time, Mr. Townes starts up the CAVE and loads the building. He then steps inside the CAVE, put the stereo glasses on. Mr. Best and the subcontractor for interior wall have not arrived yet. So, Mr. Townes walks around the building by himself.
Similar fashion applies to the subcontractor.
The three parties greet one another and get to work. They navigate to the location where the water boiler will be placed. They discuss key feature and possible alternate designs and model of the boiler. At one point, Mr. Townes want to show an alternative location for the water boiler at the back of the building. Therefore, only Mr. Townes is doing the walking while the Mr. Best and the subcontractor enjoy their ride.