Juggernaut
Mu-43 Regular
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It looks a bit of hyperbole but that's the best result I can have. The toughest part was the sky toning as the sky part had lost majority of the details when the photograph was taken. I tried several possible means as advised by RichardC to expand the tonal bars and then the image became illuminated except for the sky, which turned to be opposite way of clarity. To conformity with the colors of nature (only what I can remember is the rust red of the soil, thus I used it as the baseline), I almost gave up the sky part, just letting it be as the result could be.
Very appreciate the enlightening replies for me to navigate the best result.