Normalmaps everywhere/2

First followup to this: http://c0de517e.blogspot.com/2012/02/normalmaps-everywhere.html

Nothing smart really, it's just a small Mathematica playground I made to visualize and experiment with normalmaps, mipmaps and phong, I'm posting it in case you want to play too!

http://www.scribd.com/doc/80425295/Normalmaps-mipmaps-Mathematica-playground

Just to be clear, this is something to have fun and experiment, of course if all I wanted to do was to fit Phong (or any other rotation-invariant BRDF or part of them) I could have done it better in many other ways (first of all, by considering a single parameter that is the dot between the normal and the reflection vector/halfvector instead of working on the hemisphere). Hopefully I'll have something more "serious" coming out on the topic soo.. eventually :)