Imagine a VR game where your avatar can laugh, smile or frown as you do while interacting with other players -- sounds fun, right? Well apparently, that kind of face-tracking tech already exists. Facebook's Oculus division has teamed up with University of Southern California researchers to develop a way to track your facial expressions while wearing a chunky VR headset. What they did was insert strain gauges within the the Rift's foam padding to monitor the movements of the upper part of your face. To monitor the lower part not covered by the headset, they attached a 3D camera to a short boom clipped to the center of the Rift. As you can see in the video below the fold, a virtual avatar successfully mimicked the expressions of their testers with that setup.