I think the floor is too uniform. Its just a relatively flat plane wth rocks and rubble. Maybe add ramps or building set on slightly higher elevations?
I think you could use sth from this tutorial by Lennyagony, look for the low poly part and the parts below that. http://steamcommunity.com/sharedfiles/filedetails/?id=123397498
Found the stupid hiden folder seems ive had it downloaded since the 27th... windows update keep throwing errors at me....eh Microsoft never fails to impress ~______~