ZBrushCentral

Fiber question

I never used fibers before and I followed the only tutorial that I was able to find (http://www.cgfocus.com/tutorial/story/25).
It uses the 2.5D fiber brush, but from what I understand, if I enter projection mode, paint fiber with the 2.5D brush, and then I’d like, for example, get back to 3D, rotate the object and re-enter 2.5D to add fibers to that side, previous fibers are gone.
Am I doing something wrong or is it supposed to be like that ? Thanks.