Hi
CE has no dedicated functionality to split up your imported obj into separate buildings. still:
- you might try to convert the imported model into shapes, select those belonging to one building and combine it.
- you can export an obj per building and then import all of them in CE.
- you can export the terrain from CE, import it into SketchUp and do the alignment there.
A typical use case for obj import would be importing one (hero) building into CityEngine. CityEngine (i.e. CGA) is perfect to create the mass models that you are showing in the screen shot.
Additionally also from our side: Thanks for your feedback. The forum is very important to us, and we put more resources to it.
Have a nice weekend
Christian