My first thought was actually a rather troubled sea, but that might relate to my fear of being out of sight of land and caught in a storm on the ocean seeping through my subconscious. *Shrugs* Second was sand dunes. Never having seen enough snow to make ripples and waves that didn’t occur to me at all. Regardless, I like it. I could stare at it for hours like some people stare at clouds (picking out imaginary shapes in them and whatnot). Also, were it upside down I think I would be guessing it were clouds.