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462 Chapter 20: Managing Scenes and Projects
AccuRender materials that are applied to objects
in the Revit drawing are translated when you link
or import the drawing to 3ds Max. If the texture
used for the material is a digital bitmap like a BMP
or JPG file, the texture will b e included with t he
mater ial.
However, if the texture being used is one of the
Procedures, the texture is not t ranslated when the
drawingisbroughtinto3dsMax.Inthesecases,
you will see only the diffuse color.
See also
Material Editor, Materials, and Mapping (page
2–1239)
UV W M apping on R ev it Elements
An impor t ant consideration in how many
materialsrenderishowtheyare“mapped”tothe
surfaces of the objects they are assig ned to. This is
especially important for materials t hat use
bitmaps
(page 3–1011)
to define the diffuse color of a
material, or the bump and cutout special effects.
As an example, you m ay have scanned a picture
of wood grain for use in a material, but when
the material is applied to an object, how large
should the image of the wood grain be? Which
way do you want the grain to run, and how do you
want the grain to wrap around the corners of a
three-dimensional object?
How two-dimensional maps are applied to
three-dimensionalsurfacesisrepresentedby
mapping coordinates (page 3–1061) ,whichare
stored as
UVW coordinates (page 3–1122) .Revit
assigns UVW coordinates to object components,
so in cases where mapping coordinates are
important to the rendered appearance of an object,
3ds Max translates these coordinates and stores
them in the object mesh that is displayed and
rendered in the 3ds Max scene.
Using Revit Materials on 3ds Max
Geometr y
After you’ve linked a DWG file that has been
exported from Revit, you may find that some of the
materials that were created in Revit could b e used
onnewgeometryyou’readdingwhileworkingon
the model in 3ds Max. Reusing a material is often
easier tha n creating a brand new one.
For example, let’s say a wall element in the Revit
project has a brick material that you’d like to use on
anobjectyouaddedtothemodelwhileworking
in 3ds Max. If you simply apply the material to the
new object, you’ll find that the texture map does
notshowasitdoesonthewallthatcamefrom
Revit. This is because UVW coordinates of the
new object are not set up to coordinate with the
Tiling parameters of the Revit material.
When using Revit materials with objects created
in 3ds Max, t here are really two things to keep in
mind;
• All materials from Revit use real-world scaling.
• Real-world scaling must be active for objects
you’ve created in 3ds Max.
Thereareafewwaytomakesureyour3dsMax
objects are using real-world scale.
• If you’re working with a primitive object, like
aboxorcylinder,makesureReal-WorldMap
Size is active.
•Formorecomplexobjects,applya
UVW
Map modifier (page 1–905)
and make sure
Real-World Map Size is active.
• Assign the object a
MapScaler modifier (page
1–705)
.