Hatchmaker

Revit uses old-school Autocad hatch patterns (.pat files) but provides no means to create them.  Lanny Schiele created a great Autocad utility for drawing patterns years ago, and it still works well.

http://cadtips.cadalyst.com/patterns/hatch-maker
http://revitclinic.typepad.com/my_weblog/2008/11/custom-fill-pattern-anyone.html

Hatch patterns set to orient to object is one way to "ziptape" firewalls.  Although cumbersome, this method ensures that the pattern sticks with the wall.  Revit feature request:  Wall centerline that allows setting of width, linetype, color, and location within wall!