2008

[derivation method] Choose the method for deriving imported AutoCAD
primitives from this drop-down list. The options are as follows:
■ Layer, Blocks as Node Hierarchy All objects on a given layer in the
AutoCAD drawing that aren't in blocks are combined into a single Editable
Mesh or Editable Spline object when imported into 3ds Max. The name
of each imported object is based on the AutoCAD object's layer. The
imported object name has a “Layer:” prefix and is followed by the layer
name. For example, all AutoCAD objects residing on the layer Walls become
part of the Editable Mesh named Layer:Walls after they are imported to
3ds Max.
Each block is imported separately as a hierarchy, with the block itself as
the parent object and its constituent parts as child objects. The child objects
of the block are combined by layer.
■ Layer, Blocks as Node Hierarchy, Split by Material This works the same
as the Layer, Blocks as Node Hierarchy option, with the following additional
functionalities: the combination of non-block objects by layer, followed
by material and support for multiple materials assigned to ACIS solid and
polymesh geometry.
■ Non-block layer combination
For example, take an AutoCAD file with six objects in layer A: three have
a Brick material and three have a Stone material. Using this option, this
file would be imported in the form of two objects, or nodes, one containing
the Brick material and the other with the Stone material.
Each block is imported separately as a hierarchy, with the block itself as
the parent object and its constituent parts as child objects. The child objects
of the block are combined by layer.
■ Multiple material support
On import, ACIS solids and polymesh geometry can support multiple
materials. For polymesh geometry, one material is supported per face. For
an ACIS solid, if the solid has more than one material associated with it,
a multi/sub object material is created that contains the materials used. If
the solid has only one material associated with it, a standard/architectural
material is assigned instead.
NOTE Multiple material support for ACIS solids applies to DWG files imported
or file linked from Revit Architecture 2008 or AutoCAD Architecture (formerly
Architectural Desktop or ADT) 2007 and later.
AutoCAD (DWG) Files | 6987