Here's my 2 bits...this looks pretty good for the most part but one minor tweak could, I think, really bring this one out. If these are to be continents those mountains are going to need some foothills...so it might be worthwhile to crop the mountains down a little bit to accommodate those foothills, then of course put those foothills in and this should really look good. Anyway, disregard if ya choose as it's just my opinion