The mapped range is 30 feet by 6 feet, within which perspective will be good and precise.
So, please map and work only on 3 sides of the assembly. Technically, you can map and use all 4 sides, but there are chances that the result will be much less accurate.
Here are examples of your possible 3 sides working area:
While mapping the area, the camera is looking for the unique features of the area to mark and remember them. It captures the initial data, so the system will remember its environment when you walk around.
Map the area, pressing on the mapping button that will appear as a prompt.
Map the range 30 feet by 6 feet, as mentioned above.
Do not leave the area of the QR target before you click on the Mapping button. If you want to move away from target, you have to start mapping the area first.