There's a great, free mapping and contouring program called Quikgrid http://www.perspectiveedge.com/index.html that would be a way around the limitation of using the built-in 3D viewer only in AmiBroker ("3D viewer may only be used together with AmiBroker and only on AmiBroker-generated files"). It was generously made free by its creator and is, as a result, not supported.
