I've been following this paper to implement materials in a raytracer I'm building. As well as https://blog.selfshadow.com/publications/s2015-shading-course/burl

I've been following this paper to implement materials in a raytracer I'm building. As well as https://blog.selfshadow.com/publications/s2015-shading-course/burley/s2015_pbs_disney_bsdf_notes.pdf https://blog.selfshadow.com/publications/s2015-shading-cours... and this homework assignment https://cseweb.ucsd.edu/~tzli/cse272/homework1.pdf https://cseweb.ucsd.edu/~tzli/cse272/homework1.pdf