It sucks. Why do people who don't live in deserts always believe that deserts are all sand and cacti?
I live in a desert, and did you know people actually have palm tree's in their yards? Some people have lawns to. It even snows in some parts. Stop thinking that deserts are god damn sand pits. The Sahara Desert is the only one that is like that, all the rest are not.
Fix it up, put some mixed sand textures + grass textures. Also use the Shape replicator for the trees which should be cacti that are native to the area.
Do some loving research and at least look at some pics before you make a god damn map like this.