It would be very hard. You would fall. Which would be wrong because you’re not falling in game. You said harness but it would need to by a smart dynamic harness

It would be very hard. You would fall. Which would be wrong because you’re not falling in game. You said harness but it would need to by a smart dynamic harness that adapts the tension which would be weird if you moved your leg oddly. Some relevant edge cases: 1) you’re at a ledge and trying to dip your foot down (or conversely as shown in ready player one the film, you’re at a precipice and feel off balance because your VR foot is not fully supported by VR ground) 2) you’re running and a limb or foot hits a small object in a way that should realistically cause you to fall or be obstructed. Extremely tough problem to solve with the harness idea. You can handle different edge cases with reasonable band aids but not comprehensively in a way that will work for general movement.