Kent's Custom Absorption & Fresnel Nodes
Hey fellow CGC citizens. Here's where and how to find Kent's custom Fresnel and Absorption Nodes:
It's in the Shader Forge Course. Go to #12 Marble. Download the source files for Marble. In your project, go to Append, click on the Marble download. Find "finish.blend" and click on that. Find "NodeTree" and click on that. There you will find both the Fresnel and the Absorption. Select them both and hit "Append from Library." There you go.