I have good familiarity with Google Sketchup and would love to help out, but I don't know how much worth my contribution might be. But making little 3d models of ordinary villages, cities, farmland and such is something I experimented a lot with when I was distracted by the "worldbuilding" phase of my novel-writing instead of the actual writing. (I eventually gave up the concept and moved to straight 2-dimensional art for my map.)
Looking at Mighty Empires, it'd be pretty easy to make some low-poly representations similar to those villages and towns. I imagine you'd want a number of variations on basic forms. Would you want these to represent the cities and towns from the cities and townsland regions, or would you want to scatter little "villages" all over the place (since they would be in reality) as well?
