Very nice! I love the shadow of the tree crossing the shadows of the rippled sand. Maybe bump up the contrast a touch?

beautiful, love the lines.

well spotted and photographed.

Nice job!

very nice texture u grabbed....

Wow!!!
Great capture

This is beautiful. Very well done!
You should submit this as a Photoshop Contest Suggestion after the contest is over - It would be great fun to play with!

What are the multiple spots in the middle? Are they some type of lens flare? I've never seen one in that pattern before.
I love the patterns in the dunes, and the overall composition is wonderful, but those spots are weird.

This is a 12 shot vertical piano, there was lens flare in multiple frames and when auto merged in PS this was the result.