8

736 Chapter 8: Modifiers
Plane with fractal noise app lied
Textured plane with noise creates a stormy sea.
Pr ocedur es
To apply noise to an object:
1.
Select an object and apply the Noise modifier.
To animate, move to a nonzero frame and turn
on the Auto Key button.
2. In the Parameters rollout > Strength group,
increase Strength values along one or more of
the three axes.
You begin to see noise effects as the st rength
goes up.
3. In the Noise group, adjust Scale. Lower values
increase the dynamics of the Strength settings,
makingtheeffectmoreobvious. SeeNoise
group, below, for other options.
If you’ve animated this procedure, you can
change parameters as the animation runs to see
the effects.
For another source of noise effects, go to the
sub-object level of the Noise mo d ifier and
transform the gizmo and center of the modifier.
To create ter ra in ef fects:
When set for Fractal, the Noise modifier produces
a random f ractal noise that creates a variety of
topological and terrain effects. You can animate
these effects or use them to model static landscapes
and other complex forms.
The following steps assume you begin w ith a broad
object like a multi-seg ment b ox lying on the XY
plane.
1. Apply the Noise modifier to the object.
2. In the Parameters rollout > Noise group, tur n
on Fractal.
Roughness and Iterations settings are now
available.
3. Increase Strength on the Z axis and adjust other
parameters.
Once you h ave a base terrain, you can select
sub-objectswithEditMeshandapplyNoiseto
grow mountains in a smaller region. You can
also apply a second Noise modifier to amplify
the first one.
Interf ace
Modifier Stack
Gizmo/Center—Yo u c a n m o v e , ro t a t e , o r s c a l e t h e
gizmoandcentersub-objectstoaffectthenoise.
You can also animate the sub-object transforms.