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538 Chapter 20: Managing Scenes and Projects
two different files, such as Basic Wal l: Generic –
12” Masonry. If a naming conflict arises when
two scenes are merged, the program applies the
last loaded material used in the Multi/Sub object
mater ial.
For example, if you import two files, file1.dwg and
file2.dwg, and they both contain a material named
Brick; the Brick material used is the one from the
second fi le (file2.dwg).
Or, if file1.dwg contains a material named Brick
that is internally stored as material ID 222 and
file2.dwg contains a different material stored as ID
222, the material used in the scene when they are
imported is file2.dwg’s material.
If two solids share the same material ID, they will
share the same Multi/Sub-Object material.
Non-AutoCAD Mater ials
3dsMaxdoesnotimportnon-AutoCADmaterial
IDs. The only non-AutoCAD Architecture I Ds it
preserves are Color IDs.
ACIS Soli ds
DWG ACIS solids import as solid objects in
3ds Max. You cannot separate faces of an ACIS
solid object unless you apply the Edit Poly (page
1–640) or Edit Mesh (page 1–634) modifier.
Tip: You can access the material ID value assigned
to this face with the Edit Poly modifier.
ACIS Solids and Materia ls
ACIS solid materials display in the Material Editor,
along with any other imported ma terials.
When you apply a bitmap material to an ACIS
solid, it is applied to every side of the object. For
example, a brick bitmap material that you apply to
a wal l object appears on both sides and all edges of
the wall. If you want to apply a material to each
faceID,youcanuseaMulti/SubObjectmaterial
so you can assign sub-materials to each face ID.
When you import A CIS solids into 3ds Max,
procedural textures are not imported, only
materials For example, a br ick wall in Revit may
have mortar lines procedurally drawn on it in red,
but if the object is an ACIS solid, the morta r lines,
which are procedural hatches, are lost in 3ds Max
When an ACIS object’s materials are show n as a
Multi/Sub-Object material in the Material Editor,
each material name appears in the Material/Map
Browser, for example, Default wal l or Basic Wall:
Generic – 12” Masonry.
Poly mesh
Polymesh DWGs import as polymesh geometry in
3ds Max. Un like ACIS s olids, you can mo dify and
edit any face of a poly mesh object.
Polymesh Objects and Materials
When you import a polymesh DWG file, 3ds Max
considers each polymesh face as a separate entity,
w ith one m aterial permitted per entity, which
allows it to contain multiple materials.
You can apply a bitmap material to the different
faces of polymesh geometry, un like ACIS solids,
where you would need to use a Multi/Sub-Object
material to create the same effect. For example,
you can selec t the outside face of wall and apply
a brick bitmap material and also apply a diffuse
materialontheinsidewalltosimulatewhitepaint.
When you import a poly mesh DWG file, ever y
material used in the scene appears in the Material
Editor as a separate material, where you can edit it.
When the Material Editor shows a poly mesh
object’s materials, each material name appears in
the Material/Map Browser, for example, Default
wall or Basic Wall: Generic – 12” Masonr y.