Autodesk 12812-051462-9011 User Guide 3 - Page 1771
AutoCAD Architecture Files
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to intelligently manage your design intent, but it can also lead to some unexpected results, especially when using topology-dependent modifiers. "Topology-dependent" simply means that the modifier is relying on the particular arrangement and number of faces and vertices that comprise the mesh representation of the object. It is common, for example, for the modifier to cause an action to be performed on the nth element it encounters, say the "twelfth" face or the "fourth through the twentieth" vertex. It is easy to perform edits on the base object in AutoCAD that would cause the definition of the nth element to change, which would result in the modifier yielding unexpected results when the drawing is reloaded in 3ds Max. Not all modifiers are topology-dependent. When you attempt to use a topology-dependent modifier on linked AutoCAD geometry, a warning dialog is displayed that gives you an opportunity to continue or abort the operation. When you use modifiers on linked AutoCAD objects and blocks, remember that the VIZBlock object you see in 3ds Max does not contain any geometry directly; applying modifiers to VIZBlocks will never have any visible effect. Instead, apply modifiers to the component objects below the VIZBlock in the 3ds Max object hierarchy. Copying Actively Linked Objects You can copy actively linked objects in 3ds Max; the copies are automatically converted to editable mesh objects. If your selection contains several objects that instance another object, the resulting copies also instance the same object. However, it is recommended that you do not instance or reference actively linked objects, as this can introduce instability to the scene. See also: ■ Using Modifiers on page 1085 AutoCAD Architecture Files DWG files from AutoCAD Architecture (formerly Architectural Desktop or ADT) often contain additional information, such as special objects, material definitions, and styles. 3ds Max is thoroughly compatible with AutoCAD Architecture, and it recognizes all of these specialized objects and definitions during the file link process. 7026 | Chapter 23 Managing Scenes and Projects