9

DWG/DXF Import: Geometry Panel 541
Note:
M ultiple material support for ACIS solids
appliestoDWGfilesimportedorfilelinked
from Revit Architecture 2008 or AutoCAD
Architecture (formerly Architectural Desktop
or A DT ) 2007 and later.
Note: This derivation method is intended for
use with AutoCAD 2007 (and later) format
files. Using this method with DWG fi les created
with previous versions of AutoCAD may result
in data loss.
•
Entity, Block s as Node Hierarchy—Every
imported object not in a block is represented as
a separate object in the 3ds Max scene, without
regard to layers. The nodes are then placed on
scene layers that correspond to the drawing
layers. 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.
One benefit of this option is that you can
apply instanced animation controllers (page
2–293) to block subcomponents and thus, by
transforming a single member, transform a ll
members at once. For example, in a scene
con taining a conference table with six chairs
around it, you could move all of the chairs
simultaneously by moving a single chair.
Another advantage is that al l geometry is
instanced, so edited UVs and normals and
other modifications need be done only once.
Multiple materials per object are supported
w ith this option, if needed. If the object is an
ACIS solid, and has more than one material
associated with it, a multi/sub object material
is created containing the materials that can
be edited in the Materials Editor. If the solid
has only one material associated w ith it, a
standard/architectural material is assigned
instead. If the object is a Poly mesh, one
mater ial per face is supported.
Note: M ultiple material support for ACIS solids
applies on the DWG files imported or fi le linked
from Revit Architecture 2008 or AutoCAD
Architecture (formerly Architectural Desktop
or ADT ) 2007 and later.
Note: This derivation metho d setting might
cause unreliable material propagation when
importing drawings containing dynamic
blocks. Materials may propagate to some block
instances and not to others.
Wa rn in g : This option has the potential to create an
enormous number of objects in your scene.
• Layer—Imported objects are combined in
3dsMaxaccordingtotheirlayer.Objectsin
each of the associated application’s la yers are
combined into one object, with the exception
of blocks, each of which is represented as an
individual VIZBlock (not a hierarchy). Multiple
inserts of the same block are represented using
instances in the scene. Material assig n ments are
lost but material IDs are preserved.
•
Co lor—Imported AutoCAD objects are
combined in 3ds Max according to their color.
Allobjectsofthesamecolorarecombined
into one object, with the exception of blocks,
each of which is represented as an individual
VIZBlock (not a hierarchy). Multiple inserts of
thesameblockarerepresentedusinginstances
in the scene. Material assignments are lost but
material IDs are preserved.
Note: Blocks c a n contain objects with different
colors. However, when sorting, 3ds Max
considers only the color of the block itself. Also,
3dsMaxobjectscanonlydisplayonecolor,
unless a material is applied.
•
Entity—Provides a one-to-one correspondence
between AutoCAD objects and 3ds Max
objects. Foreachimportedobjectorblock
in the imported file, the importer c reates an
independent object or VIZBlock, respectively,