This is one of my very favorite sunset scenarios: the minute or so when a textured, midlevel cloud deck can catch the reddest final rays of direct sunlight at that level, layered beneath slate-colored clouds in shadow, while still-higher cirrus basks in more yellow-orange hues, all floating through deepening twilight blue. Everything in the photo above ground level is just gas and condensed water vapor, but with astounding visual form when cast aglow.
Norman OK (12 Aug 15) Looking W
35.1936, -97.3729