8

Displace Modifier 609
Displace used to change the sur face in the container
There are two basic ways to use the Displace
modifier:
• Apply displacement effects directly by setting
Strength and Decay values.
•Applythegrayscalecomponentofabitmapped
imagetogeneratethedisplacement.Lighter
colors in the 2D image push outward more
strongly than darker colors, resulting in a 3D
displacement of the geometry.
The
Displace space warp (page 2–72) has similar
features. It’s useful for applying effects to a large
number of objects or a particle system.
Top: Bitmap displacement on a patch and the bitmap u s ed.
Bottom: Terrain effects using Displace
Force Distri bution
Displace distributes its force through four different
gizmos: Planar, Cylindrical, Spherical, and
Shrink Wrap. Gizmos are also used as mapping
coordinates for applying bitmaps. S phere and
Shrink Wrap have the same effect when modeling,
but differ in the way they map.
The Spherical and Shrink Wrap g izmos begin
withauniformfieldaroundthem.TheCylinder
and Planar gizmos are both directional. Cylinder
pushes at r i ght ang les to its axis, and Planar pushes
at right angles to its surface.