Hi Loukie,
While I do like the tones of this image I do find the large negative space a bit over bearing.A large negative space needs an equally strong (or even stronger) counter balance. Looking for different angles may have helped bring out the geometric shapes a bit more. A different angle may also have helped bring out more of the sand textures. Hope you took plenty more!
This really works for me. I look at the shapes and the abstract quality of it. Almost a ying-yang comp. Really nice. Maybe brighten the lighter dune a bit more to emphasize that.
I understand the point that Roman is making here but for me, in this case, I like the contrast to the dark shadow and sun-drenched dunes in similar proportions.
I think Paul was refering to brightening the darker dune a bit more - that I can agree with.