Hello, I am working on traffic simulation in unity 3d. I have simulated Straight Roads and U-turns but now I want to simulate using real world map like a city in my country (Pakistan) or any other country. My question is how can I import real world map to unity 3d with its height map (Get road data from OSM maybe) I need height Map because if there is some kind of flyover or highway the terrain should have that height at that position. I know there are different tools to do it Like ArcGis etc but I don't know how to use them and combine it with unity 3d. I have no prior knowledge of ArcGis or any other geographical software. I need you guys to help me here. someone who have done such thing before or know how to do it. If you guys know how to combine ArcGis and Unity 3d so do share the complete explanation or link to the article or tutorial. For the reference to what I want you can think of Vissim traffic simulator.