Another page from my notebook:
The directional brush is great used in circular strokes to create easy hair texture as viewed down the y planar.
In this way (and many others) many of ZBrush’s Tools excell over those found in the likes of photoshop,Painter or BodyPaint.
Using the direction brush to create a planar hair map from above, this will be 3D copied onto a sphere.( Transform >3D Copy, where a tool in edit mode that has a new texture assigned to it picks up the texture of the underlying canvas when 3D Copy is pressed - an oldy but goody )
Choose directional brush
switch zadd on
choose a large draw size 155-195
change the draw parameters as above - decreasing the width and height etc to suite.
Create the strokes by circular movements with the wacom pen around the centre of the canvas - hey presto, hair from above.