Very nice, but forgive me my crits; I would delete the fake stones. They don't really fit, I think. And you can add more realism to the dead branchy bush by adding a color fractal (to get some more variation in color). Either in the color input or below the default (with one color).
An interesting thing would be to add a flat lake a couple of centimeters beneath ground level, as if some stagnant water is still there. But it wouldn't be true to its name anymore.
---Dune
