9

744 Chapter 8: Modifiers
Plane with fractal nois e applied
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 t he strength
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 modifier and
transform the gizmo and center of the modifier.
To create ter r ai n ef fects:
When set for Fractal, the Noise modifier produces
a r andom frac t al 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 follow ing steps assume you b egin with a broad
object like a multi-segment box lying on the XY
plane.
1. Apply the Noise modifier to the object.
2. In the Parameters rollout > Noise group, turn
on Fractal.
Roughness and Iterations settings a re now
available.
3. Increase Strength on the Z axis and adjust other
parameters.
Once you have 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.
Interfa ce
Modifier Stack
Gizmo/Center—Yo u c a n m o v e , r o t a t e , o r s c a l e t h e
gizmoandcentersub-objectstoaffectthenoise.
You can a ls o animate the sub-object transforms.