Seems... Done before. The height variation on the sides of the road are lacking, the sun seems really white for the fog, tint one of the two to coincide better with the other.
The environment overall is dull... Not many rocks, bones, plants, or wildlife. Sure it's a barrens environment but add some birds at least. And the grass models you chose seem to clash, because one fades well with the grass tiles, but the other sticks out and clashes.