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UVW Mapping in AutoCAD Architecture Objects 447

See also

Material Editor, Materials, and Maps (page 2–1395)

UV W M apping in AutoCAD

Architecture Objects

An important consideration in how m any

materialsrenderishowtheyare“mapped”to

thesurfacesoftheobjectstheyareassignedto.

This is especially impor tant for materials that u se

bitmaps (page 3–917) to define the diffuse color of

a material, or the bump and cutout special effects.

As an example, you may 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 3–967),whichare

stored as UVW coordinates (page 3–1028).In

cases where mapping coordinates are likely to b e

important to the rendered appearance of an object,

AutoCAD Architecture (formerly Architectural

Desktop) assigns UVW coordinates to object

components.3dsMaxtranslatesthesecoordinates

and stores them in the object mesh th at is displaye d

and rendered in the 3ds Max scene. You can adjust

these coordinates in 3ds Max using the UVW

Xform modifier (page 1–934), or you can redefine

them all at once using the UVW Map modifier

(page 1–922).

Impor tant: Make sure that Rescale is turned on in the

Attach Panel of the File Link Manager dialog. Ot herwise,

if the units do not match, the UVW coordinates will be

incorrectly scaled whe n linked to 3ds M ax.

Dr awings E xport ed f rom

Revit in 3ds Max

TheExportfunctioninAutodeskRevitletsyou

export models to DWG or DXF file formats. In

Revit 6.1 and 7.0, the exported drawing entities

contain additional information, “Revit data,”such

as their originating Category, Family, Type, and

Material.

The File Link Manager (page 3–422) and

DWG/DXF Import functionality looks for and

processes this additional information. When

“Revit data” is found with an object, the object is

treated differently by the import/file link process.

The primary differences are:

•objectnamingconventions

• scene organization of incoming geometry (how

the objects are combined)

• parent-child hierarchy of scene objects

• possible automatic material assignments

Impor tant: 3ds Max cannot directly import (or link) a

native R e vit project (RVT). You must first export a DWG

or DXF file from Revit before you can import the model

into 3ds Max. The impo rted or linked file will contain

scene objects that correspond directly to individual Revit

objects. In addition, most materials are translated and

assigned to the objects, giving Revit customers a head

start toward better visualization and faster rendering

of their models.