Papervision: Does an object get rendered and uses processing

My scene is a carrousel and it contains too many objects in view of the camera. I will move the camera so that only a few objects are in the sight line of the camera. Will this reduce the processing that takes place? I would like to cull the objects which are outside of the view of the camera without being as brutal as to ‘removeChild’ them from the scene. How could I achieve a more efficient scene, or can someone clarify how much of the scene is processed outside of the cameras view? Many thanks in advance.