This was a fun project , the closest version I could get was this , doing applications to the pic in its entirety . The part I couldnt get was increasing the contrast on the clouds and at the same time not make the shadows on the ground too dark since they are in the same value range . I figure the process has to divide the photo by some other calculation. And I could replicate the effect better if I simply used photoshop to divide the sky from the ground for processing. Eventually I went off on a tangent which I added as well, pic 2. obviously from undersized jpeg and resized once more theres color separation which I didnt have at home I can put it on flickr if you want.
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