Although old Ben was a hermit, he still had to make his way into Mos Eisley once in a while for groceries, like Bantha milk. Hey, a desert planet and the occasional sand people attack takes it’s toll on a vehicle.
If you look at it, it almost looks like a picture of the sky, with clouds and the sun trying to break thru. On the front and the back it does this. Almost like a picture of a very beautiful purple sky. Or the moon at night. The weed could also be helping with this.