Vectorworks 2013 introduced this concept called the Clip Cube. The clip cube is a 3-D modeling technique that allows you to hide all the 3-D objects outside of the clip cube.
It works like a three-dimensional viewport crop, allowing you to work quickly in a complex 3-D model. I’ve recently been working on a complex 3-D model and I was showing my client how to use the clip told to crop the model to focus on the area we need to work on. In his words this is a “game changer”, making it so easy to work on complex models.