8

Material Properties Ro llout 1151
make one checker color another checker map
on channel 2.
Inter face
Material Properties rollout
Mater ial ID—Usethistochangethesurface’s
material ID number. Multiple material IDs
in a single NURBS object let you assign a
multi/sub-object material (p age 2–1403) to the
NURBS object.
Select by ID—Displays a Select by Material ID
dialog (page 1–1240)
.
Texture Channels group
The controls in this group box support materials,
including tiling and positioning mapping
coordinates on the surface.
Ma p Channel —Chooses a UV coordinates map
channel (page 3–1060)
. Range=1 to 99. A
single surface can use up to 99 texture channels.
Default=1.
Gen. M appi ng Coordinates —Generates mapping
coordinates so you can apply mapped materials to
the surface. Each sur face in a NURBS object has
its ow n set of mapping coordinates. Default=off.
U and V Offset—Offset mapping coordinates a long
the surface’s local U axis or V axis. That is, at
0.0(thedefault),themapbeginsattheUorV
origin. Increasing an Offset value moves the map
forward along that axis, and decreasing it moves it
backward. T hese p arameters are animatable.
U a nd V Tiling—Control the tiling of UV mapping
coordinates; that is, the number of times a mapped
material’s map is repeated in the surface’s local
UaxisorVaxis. Default=1.0forbothaxes(no
tiling). These parameters are animatable.
Rotation Angle—Letsyouspecifyarotationangle
for the texture. This parameter is animatable.
Texture Corners group
Thecontrolsinthisgroupboxletyouexplicitly
set which texture surface UV values to use at the
corners of a surface. These controls are especially
useful when you are matching the textures of
adjacent surfaces.
These controls are disabled unless Generate
Mapping Coor dinates is on.
Corners r adio buttons—The four buttons
correspond to the four corners of the currently
selected surface. When you choose a button, the
corresponding corner is hig h lig hted w ith a blue