Sony is experimenting with its own Vive-style VR tracking device, according to a patent filing from June. The document hints at a tracker working similarly to HTC's current virtual reality tech. Functioning as an external projector, the device would use lights and mirrors to map the player's real world movements straight into PSVR. While Sony's VR offering currently uses a camera to detect light from the player's headset, the existing tracking limits users to an incredibly small space. With light often interfering with the PS4's camera, if this new tech makes it to production it could not only give gamers more mobility but also potentially provide a more accurate and immersive PSVR experience.