Unless you plan to do some geographic landscaping module, the background for a volcanic or barren wouldn't really be that different, not to mention its an entire planet. Perhaps the urban and populated area is more arable, less arid, and less volcanic; therefore, you stil wouldn't have to worry about the volcanic effects. Just my 2 cents. Also, IIRC there's a limited to the music.2da at like 51, with the default at 48 or 49, so there isn't much room to add soundtracks.