Autodesk InfraWorks

[#1]

I was wondering if it is possible to change the roof form. The hip roofs look nice, but actually i need saddle roofs for my model.

Does somebody know if it is possible?

And if not. Is there an easy way how I could map the ground surface under the building on top of it?

[#2]

I guess with "map the ground surface under the building on top" you mean an aerial image drapped onto the terrain surface, right?

Both features you are requesting are not yet supported...