Understanding the Family Editor
Plenty of generic 3D modeling applications allow you to create content that will be used in designing your buildings, and modeling in 3D is certainly a big part of the Family Editor. But the key to the Family Editor isn't that you're modeling anything but that you're modeling something. Something specific. The thing that you're trying to design is meant to be a particular thing and behave in a particular way.
So when you're modeling in the Family Editor, you're not just trying to model how and what something: you're also trying to predict how it might change. Anticipating change is key to creating great, flexible content that is able to quickly and easily reflect your design changes.
For example, take a simple ...