Then I got kinda experimental, what if only the cities at night, and no other color data? (well, I left the ocean in place)
you might also notice I have a missing bit of elevation data in the East :/ Still working on that.
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I've been working on a poster sized render of the mid Atlantic (DC, Philly, NYC). I want to overlay more data on this. Still thinking about what. But I'm liking how the terrain is looking. Lots of little improvements yet to come.
This technique is so much fun though! Seeing the mountains "pop" as I get the lighting and displacement modifier just right in Blender is very satisfying.