Mother Nature has aeons to do this at the coast. The deserts of the world don't have dust free environments. It isn't impossible to do this for small areas which I suspect the geologists were postulating on. Clearly from the way the video camera pans and zooms around, the Apollo areas are very large and open with no extra lighting, rigging, doors or windows. Nothing but the two astronauts from numerous visor reflections. You keep making this claim as though they are in a little room or some unknown arena when this is disproven with one camera sweep!