Originally Posted by Hannican
Thank you Mark! EXCELLENT explanations!
I've been battling with your recommendations, trying to figure out how to actually do all of them (I'm honestly a total newbie to Photoshop), and I'm stuck at the part where you said "First I merged the previous results into a new layer so I could use the PS filters on it." (to start using the unsharp mask filter on it).
I can't figure out how you merged the previous results into a new layer... I've tried some merge layers, creating new layers, etc etc. I have no idea how to actually do this part =(
Sorry...

Merging several layers into a new one is a common, very useful procedure (since it allows non-destructive editing - i.e. you don't run filters on your original image). You can get the new layer by 1. Edit-SelectAll 2. Edit-CopyMerged 3. Edit-paste. Or the shortcut way... Create a new layer and CMD-OPT-SHIFT-E [Mac OS] [or CTRL-ALT-SHIFT-E on windoze]
Keep tinkering, especially if you can do it from a perspective of understanding what is happening to the individual color channels &/or components of other color models such as HSL or Lab. (This way, you can extend what you learned tinkering to new images / new problems.)
If you like the 'why it works' perspective, I highly recommend one of the (older?) Hidden Power of Photoshop Element books by Richard Lynch. I learned a ton from the copy of version 2 which I own. All the techniques & theory apply equally (and with more ease) to the full version of PS.
One more point I forgot to make in the original post: It is very important to work on a calibrated monitor so that what you see is what actually 'exists' and pretty much what everyone else will see as well.
Happy processing.
-Mark
PS. Here's my final take on your image. I didn't pay attention earlier to your comment that you like high contrast. This is kind of over-the-top for my taste, but might be closer to what you are looking for. I added several (masked) Curves layers to further increase contrast in the backgrouund, painted white (unmasked) a couple of these layers to increase mid-ground contrast, added (masked) ColorBalance and HueSat layers to fine tune the backgnd color (reducing overpowering green), and gave the sky it's own masked Curves layer (which I should have done from the start). I hope you like it as a reference to aim for. [Some of the detail is lost here as I'm using a lower quality jpg to save space in my pbase account. Also, it looks like I got a little carried away with the sky adjustment as I see some posterization.

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