In snYpirÂ's excellent land_chopper script there is a dust script.
I played around with the colors to fit the mogadishu-map.
I was satisfied with this:
color = [[0.75, 0.65, 0.45, 0],[0.85, 0.75, 0.55, 0],[0.95, 0.85, 0.6, 0.7],[0.85, 0.75, 0.45, 0]]
Try it if your want.