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1436 Chapter 16: Material Editor, Materials, and Maps
• Tilingvalueslessthanoneincreasethe
size of the map relative to the object. For
example, a value of 0.5 maps half of the
bitmap.
• TilingisuniformifboththeUandV
dimensions are tiled by the same amount.
To preview the effect of tiling:
• In the Material Editor, use the Tiling flyout
to choose a 1x, 2x, 3x, or 4x tiling preview.
Thebuttonyouchoosechangestilinginthe
active sample slot to 1
.0,2.0,3.0,or4.0inboth
UandV.
The flyout setting has no effect on the material
or its mapping. It does not change the Tiling
value or the check box
setting. It only helps you
preview the effect of changing these settings.
To set mirroring:
1.
On the Coordinates rollout, make sure Mirror
is turned on for the
UorVcoordinate,orboth.
Mirror and Tile are e
xclusive settings: if one
is set when you choose the other, the original
setting turns off.
2. Set the Mirror value for the corresponding
coordinate or coo
rdinates.
The material prev
iew changes to show the
Mirror value you chose.
To create a d ecal:
1.
In the Material Editor, choose a bitmap as a
diffuse map.
2. On the map’s Coord
inates rollout, tur n off
both Mirror and Tile for b oth the U and V
coordinates. Change the mapping to Planar
from Object XYZ.
3. Adjust the U and
V Tiling parameters to scale
the decal.
Changing the Tiling value changes the size of
the mapped bitmap as it does when you tile the
map, but with Mirror and Tile tur ned off, the
bitmap appears only once.
4. Adjust the U and V Offset parameters to
position the decal.
Note: Yo u c a n a l s o u s e t h e P a r a m e t e r s r o l l o u t’ s
Cropping and Placement controls to achieve
adecaleffect.
To offset the position of a map:
•OntheCoordinatesrollout,settheUandV
values to be b e tween 0.0 and 100, or b e tween
-100 and 0.0.
On the surface of the object, the map shifts in
the directions you chose.
UV offsets are especially useful when you have
turned tiling off and want the bitmap to appear
in a single location.
To r otate the map:
• On the Coordinates rollout, set the Angle U, V,
and W spinners.
Positive angles rotate the map in the
clockwisedirection;negativeanglesrotateit
counterclockwise.
Theanglecanbeupto360degrees,which
rotates the map completely and has no visible
effect unless you are animating the map’s
rotation.
You can also click Rotate to use the Rotate
Mapping Coordinates dialog, which lets you
change the rotation by dragging the mouse.
To incr ease or decrease antialiasing:
• On the map’s Coordinates rollout, increase or
decrease the Blur value.
For diffu se maps and other maps besides
bump maps, the Blur value is most effective