There are some peculiar things about this photo in that the foreground and clouds are sharp buit not the middle distances. Then the halo which looks like careless PP is I think the line between standing trees and felled area. Whatever when I openned it in Paint Shop Pro and added an adjustment layer/curves I found very little in the shadow part of the graph. Moving the bottom of the line to the right darkened the foreground. I also pulled the top end of the line to the right too. I don't see how for 99.9% of the time a GND would do anything for me when I have PSP. Of course I am biased towards PSP