Created some procedural sand dunes following a course by @theluthier
I think it came out looking more rocky than i would have liked, however the edit I am very happy with.
I think I am going to try and animate sand flowing over the dunes but that's a task for another day I think.
Yes, it looks more like granite scoured by sand than, well, sand. I’d change the elevated areas to granite and fill the valleys with smooth, flowing sand; then it would look perfect: except maybe the sky should be a deeper blue — I mean, in a desert, the air is dry so, no mists.