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72 Chapter 11: Space Warps and Particle Systems
repels particles moving in the same direction and
attracts particles moving in the opposite direction.
When Strength is 0.0, the Wind warp has no effect.
Decay—When Decay is set to 0.0, the Wind warp
has the same strength throughout world space.
Increasing the Decay value causes wind st rength
to diminish as distance increases from the po sition
of the Wind warp object. Default=0.0.
Planar—Wind effect is perpendicular to the plane
of the Wind warp object, throughout the scene.
Spherical—Wind effect is spherical, cent er ed on
the Wind warp object.
Wind group
These settings are specific to the Wind space warp.
Tu rbu lence—Causes particles to change course
randomly as the wind blows them. The greater the
value,thegreatertheturbulenceeffect.
Fr equ e n cy—When set greater than 0.0, causes
turbulence to vary p eriodically over time. T his
subtle effect is probably not visible unless your
bound particle system generates a large number
of particles.
Scale—Scalestheturbulenceeffect. WhenScale
is sm all, turbulence is smoother and more
regular . As Scale increases, turbulence grows more
irregular and wild.
Display group
R ange Indicators—WhentheDecayvalueisgreater
than zero, icons appear in the viewports that
representtherangeatwhichtheforceofwind
is h a lf the maximum value. When you use the
Planar option, the indicators are two planes; when
you use the Spherical option, the indicator is a
double-hooped sphere.
Icon S ize—Size of the W ind warp object icon, in
active units. You set the initial Icon Size value
when you drag to create the wind object. This
value does not change the wind effect.
Displ ace Spa ce Wa r p
Create panel > Space Warps > Geometric/Deformable >
Object Type rollout > Displace
Create menu > Space Warps > Geometric/D eformable >
Displace
Displace used to change the surface in the container
The Displace space warp acts as a force field to
push and reshape an object’s geometry. D isplace
affects both geometry (deformable objects) and
particle systems. There are two basic ways to use
the Displace space warp:
• Apply the gray sca le of a bitmap to generate
the displacement amount. Black areas of the
2D image are not displaced. Whiter areas
push outward, causing a 3D displacement of
geometry.
• Apply displacement directly by setting
displacement Strength and Decay va lues.
The Displace space warp works similarly to the
Displace modifier , except that, like all space warps,
it affects world space rather t han object space.
Use the Displace modifier when you need to
create detailed displacement of a small number of
objects. Use the Displace space warp to displace