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Real-World Mapping 1429
Real-World Mapping
Real-world mapping is an alternative mapping
paradigm in 3ds Max that is off by default. T he
idea behind real-world mapping is to simplify
the correct scaling of texture-mapped materials
applied to geometry in the scene. This feature lets
you create a material and specify the actual width
andheightofa2DtexturemapintheMaterial
Editor. When you assign that material to an object
inthescene,thetexturemapappearsinthescene
with correct scaling.
For real-world mapping to work, two requirements
must be met. First, the correct style of UV texture
coordinates must be assigned to the geometry.
Essentially,thesizeoftheUVspaceneedsto
correspondtothesizeofthegeometry. Tothis
end, a new option called Real-World Map Size has
been added to many of the dialogs and rollouts
that let you generate texture coordinates (see list a t
the end of this topic). Any dialog or rollout that
letsyouturnonGenerateMappingCoordsalso
lets you enable Real-World Map Size. Also, you
cantogglethisoptiongloballyonthePreferences
dialog >
General panel (page 3–859)
.
Most object parameters settings now include a Real-World
Map Size toggle.
The second requirement is avai lable in the
Material Editor. All 2D texture maps, such as
Bitmap, provide a Use Real-World Scale check
box on the
Coordinates rollout (page 2–1434)
.
Like Real-World Map Size, this check box is off
by default, but w hen on, the U/V parameter
names change to Width/Height and the Tiling
labelchangestoSize. Youcanthenspecifythe
horizontal/vertical offsets and size of the texture
map in cur rent
system units (page 3–893)
.
2DmapcoordinatessettingsnowincludeaUseReal-World
Scale toggle.
Following is a list of affected features (note links to
topics with more extensive information):
Bevel Modifier
Bevel Profile Modifier
Box Primitive
Capsule Extended Primitive
C-Ext Extended Primitive
ChamferBox Extended Primitive Create panel
>Geometrybutton
•ChamferCylExtendedPrimitive
•ConePrimitive
•CVCurve
•CylinderPrimitiveCreatepanel
•Doors
•EditableSpline
•ExtrudeModifier
Gengon Extended Primitive
GeoSphere Primitive