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The Head [[tracking ]] in the Rift has no visible [[latency]]. The [[Tracking#Systems|tracking system ]] employed by Oculus Rift is called [[Constellation]]. It is an improved version from [[DK2]] and [[Crescent Bay]]. While [[rotational tracking]] is achieved with [[IMUs]], [[positional tracking]] is accomplish with an [[external camera sensor]] ([[outside-in tracking]]). Tiny LED markers are placed on the HMD, the camera sensor is able to recognize these markers and track the position of the HMD. The markers on the back straps of the HMD allows the back of your head to be tracked, creating a 360 degrees of tracking. Rift's tracking is designed for both [[Seated VR|seated]] and [[standing VR]] experiences.