I don’t know, your texture is, as you say, ‘sand like’ but not really looking like real sand so it depends. Of course my experience is more snow which shares some of the same problems getting it to look like it might be snow (i.e. it’s pretty much a smooth surface shaped by wind etc. until you get real close to it) And snow has sparkles in the right light – I’ve never seen sand do that but my personal experience has been limited.
There are sand textures in the browser, I don’t know whether any of those are a place to look for hints (or if you have already been there and done that…)