Unless you are prepared to throw tons of money into this project, may I advise that nature can never truly be imitated. As I read your colour scheme of tans, oranges and blues - I can see a thousand pitfalls. The problem is that one colour does not represent the desert nor can it reflect the sky. It will look dull, heavy and false.

I suggest an alternative solution is to create a bedroom in a muted sand colour everywhere and then add 2-3 huge high saturation colour photograps of the desert (or even a wall mural) that will give you the million pixel reality that you are looking for. This basically means going for minimalist furniture and decor and allowing the images to speak for themselves.

Texture will play a part as well: soft carpeting to mimic the feel of walking on sand as it forms underneath your feet, mood lighting to reflect the different lights of the desert and finally a Dyson room heater to bring your heat level up to about 40 degrees centigrade ;-)