I have try to use the render cubemap script in the head reflection tutorial. but when i click and select the head mesh and click custom-render into cubemap ther’s nothing shown up and i have an error (NullReferenceException). can anybody help me, bcoz i can’t render into cubemap in all of my project. 
thanx.
I’m having the same issue as mbimz. I get the simple Assets from http://unity3d.com/support/resources/unite-presentations/shading-and-shadows.html