I have taken and painted the ground white with latex paint, and sprinkled on fine clear glitter, sometimes called "diamond dust", while the paint is still wet. It looks okay, but looks more suitable to the holiday christmas display. I have also misted the scenery with water and sifted on dry plaster. My experience is this looks a little too globby, and the thin layer of plaster easily flakes off. I havent tried the woodland scenics stuff, but I hear it does okay.
kevin