I sometimes take hair density to 20000. I think it depends on the poly count of the skullcap mesh. Take it up really high if your computer can handle it. Increasing the root width makes the hair look denser. Root width of 1.5 and tip width of .4 works nicely for me. Don't be afraid to use a scalp texture that tones with the hair.

Set the hair node to be opaque in shadow in the material room.

You don't have to use a skullcap - you can grow the hair directly on the head or any other part of the body.

Poser 11 Pro, Windows 10

Auxiliary Apps: Blender 2.79, Vue Complete 2016, Genetica 4 Pro, Gliftex 11 Pro, CorelDraw Suite X6, Comic Life 2, Project Dogwaffle Howler 8, Stitch Witch