This is a very strong image, it has all the hall marks of being a great one too. Technically i think you have got all the elements exactly where you want them in the image, its been composed well and exposed well too. The camel riders are riding into the image so it gives a sense of continuity from a composition perspective, the sky towards the background and the winding dunes give a sense of depth to this image. All in all like i said a very strongly composed image and there';s not much i would do differently, i guess you could say that the sky competes with the camel riders at a certain level, but is also an essential part of the overall image.
is it allowed to use a small part of your image for the desert-tile of the digital settlers of catan board game adaptation?! the game is called pioneers and is the linux open source version under GNU license. - (non-commercial)
iŽll use (if i get permission) four images and yours would be one of it and iŽll give you and everyone else proper credit by including your dA name and link to your image in a separate text file which comes with the graphic resources, code etc..