I did the bottom two thirds of this painting about nine years ago and have had it framed and hanging in  my home. I kept thinking it was bothersome that I had left the sky just a plain, hazy yellow, so a few weeks ago I unframed it, put it back on a painting board and reworked the sky after conferring with some of my painting buddies, I like the atmospheric perspective in the sky now that it matches that of the canyon better.