Autodesk 24000-000000-9860 - Revit Architecture - PC, User Manual

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NOTE Use open geometry in generic model families rather than mass families. This applies to isolated NURB
surfaces, as shown above, as well as other open geometry. For optimal performance in a mass instance, use only
geometry that can be recognized by Revit Architecture as oriented 3D geometry. Open geometry in a mass instance
can slow processing and generate warnings, but it will provide no additional capabilities beyond those available
in the generic model family.
Updating Face Selections for Roofs and Curtain Systems
If you have created a roof or curtain system on a mass or generic model, you can add faces to or subtract
faces from it. Select the element, and, on the Options Bar, click Edit Face Selection. Select the desired faces,
and then initiate the Create Roof or Recreate System command.
Remaking Face-Based Host Shapes
Building elements created by face do not update when you change the mass face. To adjust to the current
size and shape of the mass face, remake the element.
NOTE If the element has explicit constraints on it (for example, walls with a Top Constraint set to Up to Level),
then the Remake command has no effect.
To remake face-based host shapes
1 Select the element.
2 On the Options Bar, click Remake.
Walls and floors lose any sketch edits when you use the Remake command.
Selecting Face-Based Hosts from a Mass Instance
When remaking face-based hosts (such as walls, floors, and roofs), you may find it easier to select the mass
instance or generic model with which the elements are associated first, and then select the face-based hosts.
To do this, select any mass instance or generic model instance that has associated face-based elements. On
the Options Bar, click Related Hosts. The selection changes from the mass instance or generic model instance
to the selection of face-based hosts.
Controlling Visibility of Mass Instances
You can control the visibility of mass instances in the following ways:
■ On the View toolbar, click Show Mass . It controls the visibility of all mass instances in the project.
When you click Show Mass, all mass instances (including a mass and its mass floors) are visible in all
views, even if mass category visibility is turned off in the view.
■ Set view-specific mass category visibility. The view-specific setting determines whether the mass prints,
and whether it is visible when Show Mass is not turned on. To display a mass in a view, click View
menu
➤
Visibility/Graphics. On the Model Categories tab, select the mass category. If Mass is selected,
the subcategories Form and Mass Floor can be controlled independently.
554 | Chapter 10 Conceptual Design with Massing Studies