Hi everyone,
Thanks for the comments. I processed the image in ACR and CS6. The lighting is natural, but I did use the shadows/highlight tool a bit to lift the shadows (they were blocked a bit) and the highlights in the clouds were pulled back somewhat to give emphasis. Alas, this is not natural in situ sand, as to why it appears so coarse. We've had a lot of beach erosion in South Texas so what you see has been pumped in from the bottom of a nearby ship channel, a darker color and somewhat coarser.
The picture was taken in June 2016, right at the time of the solstice - we're only about 150 miles from the Tropic of Cancer, so the lighting is intense. Usually the skies here are somewhat hazy and milky, but when there are thunderstorms the haze disappears and a deep blue results.
I was basically trying the old 35 2.0 AI lens for use as a walk-around and I like the results, color and sharpness, at least at f 8. Trying to "lighten the load" in preparation for travel. Had considered a number of mid range zooms but I may just go with primes.