These placards formed a gigantic semi circle, which took up the length and breadth within the building. Note moving trolley on the track. This trolley, which had a movie camera mounted on it, was able to scan across the placards, so as to simulate a lunar orbit. When the camera reached the end of the placards it was able to swing through 180 degrees, move up, or down, and continue scanning the placards in reverse at a differing level. (See Youtube video above). Theoretically the camera on trolley, in addition to moving forwards and back, was able to zoom in and out, rotate through a full 360 degrees, and increase or decrease the height level. It first began to film the rotating sphere, (lunar approach), it then swung around and began scanning the fake lunar surface on placards, (lunar orbit).