"Are the scale bars at <a href=""https://www.youtube.com/watch?v=cfJOW2PtrGk&amp;t=1m32s"">1:32</a> right? The horizontal and vertical scales seem off by a large amount. Is there a missing decimal point or is it a camera trick?",(reply>), I think the arrows are just indicating the direction and aren't drawn the full length as the room is going off out of the camera's view.