Your confused Robert
The 3d image close-up that begins this thread is not of the so-called "magic carpet." Its at an entirely different location. And, it clearly appears to be bone dry.
As for the "magic carpet," I don't think anyone could conclude its wet. Very dry, fine particals of dust can behave in exactly the same way. Frankly, while its very interesting, it doesn't look wet or like mud to me at all.