Make fur clump together

You can create clumps of fur, such as wet or matted fur, for a whole range of fur looks.

In the Fur Description Attribute Editor there are three attributes to create and control clumping: Clumping, Clumping Shape, and Clumping Frequency. As with all Fur attributes, painting and mapping are supported.

In order to preview clumping accurately, the Fur Accuracy attribute must be set to 1 (default), which is in the shape node of the Fur Feedback Attribute Editor.

Clumping respects other attributes, including Inclination, Roll, and Polar. For example, if Inclination is set to 1 so the fur is lying flat, then the clumps lie flat too.

Note

With clumping there may be the appearance of gaps between the clumps on the surface of the object. To correct this use one or more of the following solutions:

Apply the same color to the shader that is applied to the Fur’s Base Color.
Add an additional Fur Description of overall short fur that matches the color of the first Fur Description.
Add some noise to Clumping, Clump Frequency, or other values.

To create clumps of fur on part of an object, for example, on the chest fur of a cat

Select the fur feedback or the surface with the fur on it.
In the Rendering menu set select Fur > Paint Fur Attributes Tool. The Paint Fur Attributes Tool Settings window appears.
Select Clumping from the Fur Attribute drop-down list.
In the Attribute Paint tool settings window set Value to 0 and then click Flood. This removes clumping from the object.
Set Value to 1 and paint on the object where you want clumps.

To map or paint ranges that are greater than 0 to 1, such as Clumping Frequency

Set the attribute’s Map Multiplier value to the maximum value of the range. In the case of Clumping Frequency, this value would be 100.
Now you can paint or map the attribute as usual. White will represent the Multiplier value (100), black will represent 0, and grayscale values will be distributed evenly between.

To map or paint ranges that can be negative, such as Clump Shape

Set the attribute’s Map Offset value. For example, set the Map Offset to -10 for Clump Shape.
Set the attribute’s Map Multiplier Value. For Clump Shape this would be 20 so the black to white map would represent the full range of -10 to 10.