Brush FiberMesh settings
From ZBrush Info
All sculpting brushes can be made “Fiber Aware” so that the fiber attributes that were originally set are maintained. To make any brush “Fiber Aware”, modify the settings described below. These settings are found in the Brush >> FiberMesh sub-palette. These settings also make it possible to only affect the roots or the tips of the fibers.
The FiberMesh menu in the Brush palette
Preserve Length: This setting preserves the length of your fibers during styling. A value of 100 fully preserves the fiber length while a lower value allows the fibers to become longer as they’re styled.
Forward Propagation: Affects the fiber root and propagates any adjustment along the fiber without affecting the tip.
Inverse Propagation: Affects the fiber tip and propagates any adjustment backwards along the fiber without affecting the root.
Stiffness: Tries to keep the fibers from breaking up in order to maintain straightness. Higher settings will be more resistant to fiber bending.
Springiness: Subtly tries to bring the fiber back to its original position while maintaining stiffness. Only active when Stiffness is turned on.
Front Collision DetectionTolerance: Helps prevent fibers from breaking through the visible SubTools during sculpting. Imagine it as a force field that surrounds the visible SubTools. The slider value defines how many screen pixels thick this force field will be. So a value of 10 would allow you to come quite close to the surface if zoomed in close to the model but will keep the fibers progressively farther away the more you zoom out.
This setting is enabled by default with all the brushes. It is a global setting, which means that turning it off for one brush turns it off for all.
Front Collision Variations: Will maintain a variation in the fibers when being edited to have less of an overlapping of the fibers. This will work in conjunction with the Front Collision Tolerance.
Note: It is important to remember that this setting is FRONT collision detection, only. In other words, the fibers can only sense the portion of your surface that is visible to the camera. As a result, this feature does not support symmetry.
