I think these are great, I especially like the blue one for wallpaper.
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Funny thing: my instincts, from all my early training as photographer, is to adjust the contrast of the angel photo, to get out the shadow detail (as below). But when I do it, it actually seems wrong, the composition falls apart and it becomes messy.
It's amazing how hard it is to learn to not take technique too seriously, that all the rules are only in the service of the picture, and not one of them is true always.
