9

632 Chapter 8: Modifiers
By default, Displace has the same strength
throughout world space. Increasing Decay causes
the displacement strength to diminish as distance
increases from the posit ion of the Displace gizmo.
This has t he effect of concentrating the force
field near t he gizmo, similar to t he field around a
magnet repelling its opposite charge. Defau lt=0.0.
Luminance Center—Determines which level of gray
Displace uses as the zero displacement value.
By default, Displace centers the luminance by using
medium(50percent)grayasthezerodisplacement
value. Gray values greater than 128 displace in the
outward direction (away from the Displace gizmo)
andgrayvalueslessthan128displaceintheinward
direction(towardtheDisplacegizmo).Usethe
Center spinner to adjust the default. With a Planar
projection, the displaced geometry is repositioned
above or below the Planar gizmo . Default=0.5.
Range=0 to 1.0.
Image group
Lets you choose a bitmap (page 3–917) and map
(page 3–968) to use for displacement. Both are
assigned and removed in the same way.
Bi tmap button—Assigns a bitmap or map from a
selection dialog. After you make a valid choice,
these buttons display the name of the bitm ap or
map.
This button is labeled "None" until you choose a
map.
Remove Bitmap/M ap—Removes the bitmap or map
assignment.
Blur—Increase this value to blur or soften the effect
of the bitmapped displacement.
Map group
Contains mapping parameters for bitmapped
displacement. See UVW Map modifier (page
1–922).
The four mapping modes control how Displace
projects its displacement. The typ e of Displace
gizmo and its location in the scene determine the
final effect.