There is a new set of nHair tutorials for Maya 2013 located here
http://download.autodesk.com/us/maya/maya2013_getting_started/index.htmlIn lesson 1, under the section entitled "Modify nHair attributes", there is a section describing how to add curls to hair. It further describes the use of the Clump Curl ramp for what you are looking for. The section opens with the following:
"You can add curl to hair clumps and vary the amount of curl from the hair root to tip. For example, you can set the Clump Curl ramp so that the curl is concentrated in the middle regions of each hair, then gradually decreases at the hair tip."
It goes on to illustrate an example.
Hope this helps. Good luck
🙂
