I think the rocky plain helps sell it. There is more painted stuff in there than you realise; the sky (borrowed from one of my other paintings) and mountain line are completely new, Jabba's palace is adapated from two of the original matte paintings, and most of the canyon wall is new. The only photo elements I used (for speed as much as anything) are the dry plain, the rock feature in the distance and the foremost rock surface on the right.

I added the moons last off because there wasn't enough going on in this big open space. It still needs a lot of work; the left canyon wall, removing the rock feature (I don't like it now) and I might add some element of a hangar entrance in the canyon wall.