Many times 3D families have 2D elements drafted in them. For example, door families have the swing drafted in in plan view as a symbolic line (arc). Many other examples apply.
However, there are some dangers in using nested 2D families within your 3D family: the nested 2D family must be a detail, and not an annotation! See the video below for an exhaustive example:
Have you ever gotten the typical error "Can't create duplicates in edit group mode"? Then watch this video and I will show you how to keep working with no need to quit your group edit mode. Here is the Screencast version.
If you need to re-load a large number of families, right clicking the family name in the project browser, and hitting "Reload" may become a long and tedious process.
Instead, you can select all families files, in Windows Explorer, and Drag&Drop them into a Revit window. Revit (I tried with 2009) will ask you if you want to load the families, or open the files in separate windows. Chose Load, and Revit will reload every file you dragged&dropped, also asking, time by time, if you want to make the family editable, and if you want to override the parameters value.
About the Author
Giovanni Succi is a project designer living and working in San Francisco. He is a LEED AP, and for the last twenty years he has been researching the field of computer graphics, 3D modeling, rendering, and architectural design.
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