My 2 cents..

I regularly search google images for landscapes out of curiosity. I can confirm that there is a great diversity amongst desert topographical structures and landscape colours. I think redko once said the same for the Sahara. I prefer more red coloured desert terrains, such as those seen recently in sadder TV news over Libya. Many docus I saw lately in the Sahara regions showed reddish colours.
Beautiful photos! I'm no modder, but I'd think deserts leave a big area for interpretations in IL-2's maps.
My favourites so far are redko's first desert repaint and Agracier's/Uufflakke's Sidi Ifni.
A fun vid-Morocco..I didn't post it to derail, but between the suicidal stunts and the rock-music some very cool desert impressions lurk through. But the best desert vid in that area is the one posted in the next post-last one.
http://www.youtube.com/watch?v=pVgSlaNXHeg&feature=relatedOkey, it's not a WWII vid-more like Mirage 2K..but the desert colours there rock! Typical representant of modern jet flight vids over North Arfica after my experience

What I miss in IL-2 is a variety between very arid looking regions and more lush green ones.
Cheers