Increasing the value to 3 will become a SubTool which was set to 1 at exported guides. ZTL facing down with the a vector displacement map, ZBrush camera the fibers direction will be dropping toward the front of the face.
To complement the FiberMesh feature, there is a series of Groom brushes. It actually creates two strips of overlapping 2d polys, not a single one. At setting 5 on the Brush Modifier it gives me a seam down the middle and with Strength Multiplier to 1, I get a bit of volume. These brushes are dedicated to the sculpting of FiberMesh objects.
