This is my collection of custom MaterialX files which i have built by rebuilding HLSL/CG shaders, researching new techniques, or trying to fix something. You are free to download and use them, and if you think they are worthwhile you can buy me a beer or something.
To stay up to date on my latest stuff, you can go directly to the Material Blog
My old CG Shader Blog has about 50 materials im working through to convert to MaterialX.
Starter materials in MaterialX for foundational lighting, texturing, and blending