The Basic Desert Technique - Very few places, even in the desert, are truly "flat." Though the majority of any desert board will be 1/2" hexes (TM1), wadis and dunes provide cover for unarmoured vehicles and personnel units. Choose a light tan, nearly beige, interior latex paint for your base. The other supplies you will need will be a large bottle of a rust red-brown acrylic or latex paint, white glue, and a light green ground foam. GHQ also offers sage colored ground foam just for desert bushes!
Wadis and Dunes - Wadis (dry stream beds) are made using ¼" hexes (TM2). As the surrounding areas are sand, any rainfall that enters the wadi erodes the banks in a very jagged pattern. Only GHQ's terrain system provides a simple, effective way to model this important feature. Remember to occasionally create a scooped bank where vehicles can enter and exit the wadi. In most places, the walls are impassable terrain for wheeled transport. Use the "scrap" you cut from the wadi hexes to make dune hexes.