FurCurveAttractors node

User Guide > Dynamics and Effects > Fur > Fur Nodes >

The FurCurveAttractors node is created when you attach a hair system to a Fur description. The following attributes are available for this node.

For more information, see Change fur curve attractor set attributes and Fur > Edit Curve Attractor Set.

NoteThe following attributes can also be painted using the Paint Fur Attributes Tool, or texture mapped: Radius, Power, Influence, Start Length, End Length, and Threshold Length.

FurCurveAttractors: Replace the default name for the fur curve attractor set with something meaningful (for example, windCurveAttractors).

Attractor Model

Select the type of curve attractor you want.

Local: Local attraction affects the direction and shape of the fur by the amount the nearest attractor varies from its initial state. The initial state is either the normal (by default) or the starting position of the fur, if Set Start Position To is used (see Set the start position of hair curves to the fur position). This lets you accurately propagate the exact changes in the attractors to the fur, whether those changes are subtle or extreme.
Global: Global attraction attracts the fur towards the nearest attractor hair, causing a clumping effect.

Curves Per Fur: Type the number of curves a fur should be influenced by. Use the following attributes as guidelines:

1—Every fur is influenced by the curve closest to it.

2—Every fur is influenced by the two closest curves.

3—Every fur is influenced by the three closest curves.
Global Scale: Use this setting to adjust the Radius, Power, Influence, and Length values by a common factor (including mapped values). The default is 1.0. For example:

NoteIf your fur doesn’t move during the simulation, check to make sure the multiple of the Global Scale and Threshold Length values (FurCurveAttractors node) does not exceed the Length value (FurDescription node). When it does, fur is not influenced by curve attractors. For example:
Threshold Length (0.33) * Global Scale (10) = 3.33

If the length of the fur description was 1.5, it would not be influenced by curve attractors, because the global scale value has made the threshold length 3.33, which is greater than 1.5.
Bake Attribute: Specify the attribute or all attributes to be baked.
Bake: Click this button to bake the attributes specified in the Bake Attribute drop-down list.
Radius: Set the radius in which to search for the closest curves, in world units. This value can help prevent fur strands from being influenced by curves that are unreasonably far away.
Power: This attribute is only available if you are using Global as the Attractor Model type. Use Power to set how the curve will influence the fur strands. The value you enter is the power to a falloff function that makes fur become less influenced at the base of the fur than at the tip.

0.0—The entire length of the fur is influenced.

1.0—Fur is much less influenced at the base.
Influence: Set how much influence the curve will have on the fur. The value you enter linearly increases or decreases the influence over the length of the fur. Use the following attributes as guidelines:

0.0—No influence.

1.0—Standard influence.

If you are using Global as the Attractor Model type, then you can use a higher value than 1.0 for more influence.
Start Length: Set the point along the fur, in world units, at which the fur will start being influenced. In general, this value should be 0.0, unless you want the fur to grow in its normal direction up to a point along the fur.
End Length: Set the point along the fur, in world units, at which the fur will no longer be influenced. For the best effect, this should be at least as large as the longest fur length. With smaller values the tips of the fur will not be influenced.

NoteIf you add Noise Amplitude from the Length section to your fur description, the End Length should be longer than the fur length to account for the extra length created by the noise.
Threshold Length: Fur strands shorter than this value will not be influenced at all and will therefore not move. Use this value to prevent short fur strands from being influenced while long fur strands are influenced.

Details

This section lets you set additional attributes. It includes a subsection labeled after every Fur Curve Attractor attribute. Each subsection contains the following additional attributes:

Map Offset: Set the factor by which you want to offset the attribute value. For example, if you want to change the range of values for fur Length from the default 0-1 to 4-5, set the offset to 4.
Map Multiplier: Set the factor by which you want the value multiplied. For example, if you want to change the range of values for fur Length from the default, 0-1, to 0-10, set the multiplier to 10.
Noise Amplitude: Set the noise value for the attribute. A value of 0 produces no noise or variation.
Noise Frequency: Set the noise frequency for the attribute. The larger the Noise Frequency, the more variation over a distance or area.