PiEEG XR is an upcoming Quest 3 accessory that aims to make your VR avatar expressive without adding cameras. The device replaces the Quest 3’s standard facial interface with a sensor-equipped frame that captures biosignals from sensors around the face and forehead, then streams that data into software to map avatar reactions, mixed-reality effects, and experimental controls. To be clear, PiEEG XR isn’t a consumer accessory that instantly detects emotions or animates avatars out of the box.