I created this sort of "lose ponytail" hair using Maya's Xgen hair system. I must say it was a lot of fun. Each guide (over 200) was placed manually and I used 3 descriptions to achieve the final look.
Majority of the hairs are in one bulky description, then I used another description for the smaller clumps at the front, side, and back of the hair (nape). It took just a little over a day to achieve this hairstyle.
Everything in the scene was created by me from scratch. No scans.
I used 2 area lights (rim and fill) and a HDRI for the lighting. Rending was done with arnold hair shader.