This is a sort of...volunteered commission. The author of the adventure this is for didn't really give me much detail regarding climate so I just picked colours I thought looked good together. I guess the arid look comes from living in Australia where we suffer either drought or flood it seems. I was thinking of adding a 'canvas' like texture to the background and then experimenting with blend modes, I think the one I want is dodge or something like that. I agree the mountain structure could do with a bit of work - the author got back to me with some names and the Eastern ones are called Wyrmcast Hills so obviously the shape was evocative for him. I'm going to do a bit of playing around with it tonight so if I achieve anything worthwhile I'll post it up. I suppose given the fact it will be modified I should change the tag to WIP!