Introduction
In this chapter, we will focus totally on glass materials. Cycles has a great Glass BSDF, which allows us to easily create really good looking glass. Anyway, we do not want to create just a simple glass, but to really master the art of creating any kind of glassy material. We will see how to create custom glass shaders to have more control over different settings, like reflections and refractions, but also caustics, dispersion, and absorption.