I take it you've seen this? http://wiki.polycount.com/ModularMountAndBlade Yours is more on the clean side, but even cleaner structures have a bit of messyness and funk throughout. Get some edge loops on the wood and break up the straight edges. I like the grunge on the roof, but it's not matching in other places, whether…
Nice to see somebody else trying out that Mount and Blade technique, started trying out stuff like that as well yesterday :p The reason why the guy that made he buildings included AO in the texture's is because the game itself doesn't support AO if my right.. Link to the article for those that are also interested in this…