Select your preference and move using arrow keys and space.
Next Target Space
Map Building Procedure
Collect data by just sweeping the space. An hour is good enough time for a building.
Take a rest for a while. Computer algorithm will do the rest automatically.In average, this procedure takes 10 times of data collection time. In other words, it will take 10 hrs if data were being collected for an hour.
Now you have one more third eye there. Use HMD or PC or smartphone to enjoy!