I was wondering if anyone has tried building a simulation inside a 3D urban environment. Iíve started looking at GeoMason and the CampusWorld demo is great. However, I need a 3D environment, e.g. with building heights and elevation data, so that I can make line of sight calculations. For example, say I wanted to extend the CampusWorld demo to determine cell phone coverage for each of the agents on the ground, ignoring multipath and other E&M transmission effects. What would be the best way to import the building and elevation data?