This is useful when testing an application in the Unity editor without the HMD. To use it, create a game object in your scene and drag your CameraRig to be a child of the game object. Then, add the OVRDebugHeadController behavior to the game object. Alternatively, this behavior can be placed directly on the OVRCameraRig object, but that is not guaranteed to work if OVRCameraRig functionality changes in the future. In the parent case, the object with OVRDebugHeadController can be thougt of as a platform that your camera is attached to. When the platform moves or rotates, the camera moves or rotates, but the camera can still move independently while "on" the platform. In general, this behavior should be disabled when not debugging.