Do you need a hex pattern?
If not, or if you're willing to apply your own (I used pencil marks on mine, so it is very light and barely visible), you can just use any color of fabric you like for your desert needs, e.g. sand colored, more yellow or orange, etc.?
Inexpensive, and very effective.
Add some loose, lightly scatters Woodland Scenics foliage bits to break up the smooth look, if desire. No need to glue that down, since it can just move as/when needed or desired – assume they're just little tumbleweeds when they move.
Small bits of gravel or kitty litter can also be used too, if desired, as above, to break up the very smooth look.
Vacuum or brush up and recycle after the game.
goes to sea with the Terrain Mat.
