This is really a picture of the grid shadow on the swamp surface, not the trees that frame it. This extreme back-lit scene comes from five one stop brackets processed in Nik HDR Efex using a custom preset I made for these dark landscapes.
The monochrome is made directly from the top color picture using Nik Silver Efex Pro.
Lens: Nikkor AF-S 50mm f1.4 G
Camera: Nikon D700
Exposure: ISO 200, five brackets around f/11.0 @ 1/20s, Auto WB, tripod
Location: Cache River Natural Area, Heron Pond GPS
Dates: Capture - October 29, 2010, Processing - November 1, 2010Processing: RAW file in Lightroom 3 and Nik HDR Efex