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

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export a 2D representation of the 3D model, add the 3D view to a sheet and export the sheet view. You can
then open a 2D version of the view in AutoCAD 2009.
Before exporting a Revit model, you may want to do the following:
■ Reduce the amount of model geometry to be exported. See Limiting Model Geometry Before Exporting
on page 1274.
■ Create a layer mapping file to control the export process.
To preserve information about a project, Revit Architecture automatically maps categories and subcategories
to preconfigured layer names. These layers are used by AutoCAD 2009 and other applications. Before
exporting a Revit Architecture project, you may want to change the mappings to the desired layer names.
See
Exporting Layers on page 1285.
Limiting Model Geometry Before Exporting
In Revit Architecture, a view of the building model contains many objects and lots of data. When exporting
a file for use in another software application, Revit Architecture exports only the objects that are visible in
the view (or views) being exported. By reducing the amount of model geometry (and its underlying data)
that is exported, you can achieve the following:
■ Improve performance of the export process.
■ Reduce the size of the exported file.
■ Improve performance of the importing application.
■
Reduce clutter (non-essential items) in the exported file, and hence the amount of work required to
delete these objects from the file in the importing application.
Use the following techniques to reduce the amount of geometry to be exported.
Turn off visibility of graphics
Turn off visibility for categories of elements in the view, as appropriate. For example, you might want to
omit rooms, areas, and topography from a 3D view to be exported. If you want to render an exterior scene,
turn off any elements that appear in the interior of the building. This reduces the number of objects and
the amount of data that is exported from Revit Architecture and imported into another application, thus
improving performance.
To turn off visibility of graphics in a view, click View menu
➤
Visibility/Graphics. See Visibility and Graphic
Display in Project Views on page 150.
Use a section box or crop region
To define the specific part of the project to export, use a section box in a 3D view or a crop region in a 2D
view. Elements that are completely outside the section box or crop region are not included in the export
file. This technique is particularly useful on large models. For example, for an interior rendering of a conference
room in an office building, use a section box to export a 3D view of the conference room and omit the rest
of the building.
See Using a Section Box in a 3D View on page 111 and Exporting Part of a 2D View on page 1283.
Set the detail level
Set the view’s detail level to coarse or medium. By reducing the amount of detail in the Revit view, you
reduce the number of objects exported, and the size of the resulting file. This results in better performance
in the importing application.
1274 | Chapter 22 Interoperability