awesome tutorial. i use a similar technique, but with single strains on planes that i parent to the sculp. one thing to mention: i do not use the original head of the model, but a copy of the sculp i 3point-vertex-parent to the head to work on and with. if you do so, you can easyly build up a collection of haircuts, you can use for other projects. just let the sculps textures fade out at the borders and shrink the borderedges a little to the heads center.
done in blender internal. the trick is to use a stucci texture to give single hair variation. the first object is the emitterobject without hair to show the stucci, the second is the result and the third one is the same without stucci
Nice one. I have tried all kinds of techniques from hair simulation to scripts and even sculpting to create different kind of hairs, but this one looks good.