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:
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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