DEM Earth 2 can use real height data from the OpenStreetmap database to extrude buildings to to their correct, real world relative height.
Mike Batchelor produced a very nice animation, using an early beta of DEM Earth 2
Peter Mitchell has done some fantastic renders using the DEM Earth 2 Beta. Read more
Another image created using DEM Earth 2 and its new Smart Extruder. Read more
The Next version of DEM Earth will contain an optional Integrated Openstreetmap downloader and more. Read more