"Sol 5," by Conrad J. Godly. This is a freaking oil painting. A thick, textured oil painting, with the painting running off the bottom of the canvas. And the artist has made about a hundred more. I'm in love.
This was, without a doubt, the best map-making tutorial I found. The downloads this artist has are really awesome and I had a fun time playing with the cute fonts. Also appreciated the textures they supply!