Process of creating hair

You can use Xgen to create a base hair which you then use tools to groom and style.

The first thing it to select the faces you wish to add the hair too. 

You can alter the settings to change the texture and length when creating this, but you can also use various tool to change this later. 

To create your hair, select the generate menu > create interactive groom splines

This automatically creates splines scattered across the faces you have selected. 

By using the the Xgen Interactive Groom workspace, you can easily edit the style of your hair. 

As you can see the hair is automatically divided into layers. You can add additional layers with varying attributes such as noise or clumping or you can add these using brushes. It creates a different effect if you use brushes. 

I changed the thickness and taper on the base layer to give me a more hair like effect. 

I used various brushes to comb the hair into a style I was happy with and tend, from there added a noise layer. 

I used an arnold renderer light and arnold to render