2008

Interpreting Layer Data from AutoCAD,
AutoCAD Architecture, and Revit
3ds Max has its own Layer system that looks and operates like a simplified
version of the system you are familiar with from AutoCAD or AutoCAD
Architecture (formerly Architectural Desktop) . As in AutoCAD or AutoCAD
Architecture , you can hide and unhide layers, freeze and unfreeze them, and
change the display color for all objects on the layer.
NOTE Categories in your Revit project are similar to Layers in AutoCAD. When
you export your project to a DWG, categories are mapped to AutoCAD Layers via
the Export Layers table. For more information regarding Export Layers, refer to
your Autodesk Revit Help file.
Layer operations are accessed through the tools on the Layers toolbar, and
also on an object-by-object basis using the
quad menu on page 7300 .
Unlinked objects, such as 3ds Max objects or drawing geometry that has been
bound into the scene using the Bind command, may be assigned to any layer
you choose, including layers created by the File Link Manager.
Linked objects from AutoCAD, AutoCAD Architecture, or Revit, with some
minor exceptions, will be assigned to the same layers they occupy in program
where the drawing was created.
Any changes made to the layer settings in 3ds Max (hidden/unhidden,
frozen/unfrozen, display color) affect linked objects just as they do unlinked
objects. Also, any changes you make to the layers are not reset when you reload
the drawing.
You can rename layers created by the File Link Manager. When the next reload
occurs, the renamed layer is not affected by the File Link Manager. Objects
on the renamed layer are updated; however, they remain on the same layer.
The original layer is only recreated when a new object has been created in the
DWG file. New objects are never placed on the renamed layer. You can also
delete layers imported by the
File Link Manager on page 6783 ; but only if they
don't contain any objects.
You can move actively linked objects between layers in 3ds Max. When the
next reload occurs, the objects are updated; however, they are not moved back
to their original layers. You can also place non-linked objects, such as 3ds Max
objects or drawing geometry that has been bound into the scene, on any of
the imported layers.
6782 | Chapter 21 Managing Scenes and Projects