Old thread, but good stuff.  Was using it for a water shader, as BB had setup, but mine is not coming out as "smooth" up closer?  Is it a new feature in P9 versus P8 or something, or am I just doing something wrong? 

Render Settings are same as in page 1, BB post "Posted Fri, Apr 3, 2009 10:15 am, Edited Fri, Apr 3, 2009 10:16 am"  (checked and double checked)