Those are really nice Dean, what a Dune collection you have. You nailed the shapes and light at the dune sunrise; and the bw is so stark and beautiful, with a great touch of subtle.
Dune Messiah, I guess.
#1, what a wild scene. Well done.
#2, really sweet with the light, cracks, subtle color variations and nice selection of interrupts. It would make a great canvas texture shot as background for another desert image mounted over it.