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Massing Studies

 

Importing 3D Conceptual Models Created in Other Applications

You can import geometry from conceptual modeling applications (3D models, created in AutoCAD, SketchUp, Rhinoceros, and 3ds Max, among others) done in various formats into a mass instance or mass family in the same way you import geometry into other families. You may need or want to do this in several scenarios:
  1. You have users who are comfortable with 3D modeling tools like those listed. They prefer to do the massing there and then use Revit’s analysis capabilities as well as the Building Maker to turn the mass into a building.
  2. There are shapes and NURBS forms that Revit doesn’t do easily (or at all), so you need to cre-ate the shape in another application. You need not import a whole shape, as shown in Figure 7.18—it may be just a face of a shape that you’ll need later to design a specific portion of a complex-shaped building, such as its roof.
Figure 7.18
NURBS shape created in Rhinoceros is converted t o a real wall using the Wall By Face functionality of the Building Maker
 
You can import individual masses (a complex shape, for example) or a fully developed massing study model. Regardless what the import represents, the strategy is to never import it directly into the project file but to go through a family import:
  1. If the geometry is an individual element that you’re likely to reuse, open the Family Editor by opening a mass template, and create a new mass by importing the geometry.
  2. If you have a full study model, it’s advisable to import it as an in-place Mass family in the project (use the Create Mass tool and then File/Import CAD Formats to import the 3D geom-etry created elsewhere).
We’ll talk more in Chapter 8 about how the behavior of the imported items depends on how they’re imported, whether directly into the project, in a massing family in the family editor, or in an in-place Mass family.
It is important to note that Revit won’t let you copy masses between a family and a model. You may encounter this limitation (and error message) when you mistakenly added more than one mass in one mass element but you needed to assign different parameters to each of them . To do so, you would need to move some of the masses to other mass elements. Be aware that there is no way to do it and you’ll have to re-create the wrongly placed masses from zero.