I think I got pretty close, but in testing it something bothered me, which is that the crests of the dunes don't render as smooth curves unless you're basically zoomed in enough to count the sand grains. When zooming out it immediately starts looking choppy and gets worse with distance, especially at low (ie panoramic) angles. Mind you this is with ground LOD on the maximum setting, and the dunes have been smoothed considerably in SME, and also render as smooth curves in SME (even without FSAA).
My thought is that there's probably not much being saved performance wise from using LOD for ground geometry, especially when you consider that the microdunes render the same from any distance. Basically though, I think "max detail" should be able to look better than that.
