Changing the subject slightly. Was Oblivion originally supposed to be grey? The reason I ask is because as can be seen on the documentary the magic factory and construction photos. The ride track arrived on site grey, it was then repainted black on site, in some cases with the track in situ. You can see in some of the testing footage from the magic factory, some of the track after the tunnel and before the break run is still grey, waiting to receive a black coat.