I had a perfect submission but it was shot last week: clouds from above over the Blue Ridge Mountains conforming to the ridges and valleys taken at sunset. The texture of the clouds is like foam on the ocean.
I submit this in the spirit of sharing experiments and failures. This is a local urban stream: ISO 50, 30 seconds F 16 taken through an ND filter and polarizer.
My right front tire blew out on the freeway on my way to work Saturday. I snapped this photo with my cell phone about 30 minutes after I had taken the paper bag photo which was posted above. This photo had the curves edited in Snapseed.