Real fur usually doesn’t stick straight out
of a surface but appears angled in a particular direction. The teddy
bear’s fur appears to point in different directions depending on
the particular surface.
In this section, you
modify the direction of the fur so it points in a consistent fashion
on the model. You’ll also modify the direction of the fur to simulate
a seam along the center of the bear’s forehead like a real stuffed toy
There are three methods
for modifying the direction of fur. Each method has specific conditions
for use. You can modify the direction of fur by:
- Modifying the Inclination, Polar,
and Roll attributes for the fur
- Setting a Fur Direction Offset to change
the fur feedback direction locally on a selected surface.
- Combing the fur feedback locally on a
surface using Maya’s Paint Fur Attributes tool.
the Inclination, Polar,
and Roll attributes for the assigned
fur description changes the direction attributes on the fur description
globally. You can set these attributes using either the Channel
Box or the Attribute Editor. Inclination sets
the angle or slope at which the fur description will lean in relation
to the surface. Polar sets the direction the fur description will point
in relation to the surface normal, much like the hands on a clock
face. Roll sets the angle about which
the fur description will be rotated about its follicle and is used
mostly when the fur has curl attributes applied. That is, you can
control whether the curls point up, down, or lay flat on their side.
Modifying these attributes
is a good starting point for creating a realistic fur description.
For the original Duckling fur description preset
the Inclination, Polar,
and Roll attributes are set to
0.6, 0.5, and 0.5 respectively. You won’t need to change these for this
However, when a model
is comprised of many surfaces, the fur may have a tendency to point
in a different direction on each separate surface depending on how
the surfaces were originally constructed.
To correct this you can
change the direction of the fur using the Fur Direction Offset.
The Fur Direction Offset lets you
change the orientation of a fur description locally on a per-surface
basis by applying a relative rotation value to the fur description
as it is applied to the selected surface.
To modify the fur direction using the Fur
- Dolly the camera closer to the bear’s
head so you can more closely view the direction of the fur description
on the bear’s snout.
The fur appears to point
in a clockwise direction about the bear’s snout. You can change
the direction the fur points by changing the Fur
Direction Offset value for the bear’s snout.
- Select the snout surface.
- Select Fur > Offset Fur
Direction and click on the double lines at the top of
the menu that appears so you can tear off the Offset
Fur Direction menu.
Fur Direction menu lets you rotate a fur description
on a selected surface using direction presets.
- Click on the 0, 90, 180, and 270 degree
presets one at a time until the fur feedback on the snout points
toward the bear’s face.
- Repeat this process for the remaining
surfaces that have fur assigned by selecting each surface one at
a time and orienting the direction of the fur feedback as follows:
- The fur feedback on the arms and legs
should point in a direction towards the paws.
- The fur feedback on the body surfaces
should point downwards.
- The fur feedback on the head surfaces
should point away from the center line so it simulates a sewn seam.
- The fur feedback on the outer ear surfaces
should point away from the bears head.
TipDolly and tumble
the camera as you work to ensure you have the fur feedback oriented
correctly. Try each offset direction so you know its effect on the
fur feedback on each surface. You can easily set the direction offset
back to its previous setting if it appears incorrect.
- Close the Offset Fur Direction menu when
you are finished orienting the fur feedback for all of the surfaces that
have fur assigned.