Abstract: A virtual reality system may comprise a head-mounted display comprising: a sensor for tracking an object, the sensor having a first field-of-view; an auxiliary sensor system coupled to the head-mounted display and having a second field-of-view, wherein the first field-of-view and the second field-of-view overlap to form a combined field-of-view. The head-mounted display may be configured to track a position of the object with the sensor; render the object in the virtual environment based on the position determined by the sensor; determine that the object has left the first field-of-view of the sensor and entered the second field-of-view associated with the auxiliary sensor system; in response to determining that the object has left the first field-of-view and entered the second field-of-view, track the position of the object with the auxiliary sensor system; and render the object in the virtual environment based on the position determined by the auxiliary sensor system.