Saving a Customized Model?

Deke

I'm customizing a building model...duplicating several floors to turn it from low-rise to skyscraper. I'm using the "create new nodes" option to do this, tehn stacking the elements on top of each others. I can then create a New Group and save all these parts into one "group". Is there a way to make this new skyscraper one object, or will it always be a collection of duplicated parts? My plan is to import it into Urban Sprawl and have this new building in that landscape. I'm using 4.6 on a Mac. Thanks.