8

504 Chapter 8: Modifiers
The next example shows how increasing the Friz z
Root value creates greater amounts of distortion
in the resulting instanced hairs. This image also
shows how a raised pivot in the source object
causes the root of the hair to go below the surface
of the growth object (red square). Compare this
w ith the previous example, in which the pivot rests
atthebaseofthesourceobject.
Frizz causes the instanced h airs to change shape.
ThenextillustrationshowstheeffectoftheMerge
Material check box. On the left side, Merge
Material was left on, with the result that the flower
model retained its original material and coloring
when used as hair. On the right, Merge material
was turned off, so the flower-hairs took on the
material of the flower pot growth object.
Left: Merge Material on
Right: Merge Material off
In the image below, the Root Thick setting, from
left to right, is 2.0, 10.0, 20.0, and 30.0. Note
that, with instanced geometry, the Root Thick
value affects the thick ness of the resulting object
uniformly along its height. In this case, the Tip
Thick value has no effect.
Increasing Ro ot Thick affects the overall thickness of the
hair geometr y.
Thefinalexample,below,showshowtheinstanced
hair aligns itself faithfully to the guides, no matter
how they’re styled. The styled hair was bru shed
from the center, and the instances alig n perfectly
in all directions, face up, without twisting or other
distortion. This makes it easy to style instances
like scales, etc.
Top left: The original styled hair
Top right: The instanced hair (arrows) conforms to the
styling.
Bottom: Close-up view of instanced hair
Sty ling Ha ir
The growth parameters found in the Hair and
Fur modifier can have a great deal of effect on
thehair’sactualappearanceandbehavior,butin