I finally took some time to follow up on this one. After looking at the original render I decided to use a tele lens and try something different this time.
Attached is the new setup, I hope to improve it a lot, the camera view will likely change but in general I think I'm going with a similar composition and framing. I guess I'll also add an airplane so there's another element. The ground displacement and coloring also needs some work, trees placement, color variations etc.
The new path tracer really helps, too, loving it.
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