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Another masterplan viz I made. This is the area of a coal mine in middle of west Germany (city: Essen) built in the 1830´s. The modeled area has a radius of about 6km, ca. 5 million polygons and took about 4h to render (4860*3508 with a amd X2 4800). Base map is from google earth, trees modeled on my own (500 polygons each). The center tower got a height of about 60 meters.
original size can be seen here (7,8mB):
http://home.arcor.de/ramtam/pics/umgebung%202%20final.jpg