That's good news. I was trying to write a shader recently (not an OpenGL guy) to add the Fresnel term to an otherwise snells-law shader. It's easy to find the math, but hard to find a simple implemnentation. I'd like the full basic model with that and a roughness term with a proper reflectance function (Schlick should be fine) but again, it's hard to find code for what should be a common 50 line shader.