Surface Settings for the CineRender engine consist of a set of channels, listed on the left side of the dialog box. Each channel represents one surface property (e.g. Luminance, Fog, Environment, Normal, Alpha, Glow, Transparency, Specular, Displacement).
Many surfaces can be simulated using just a few channels. So don’t be intimidated by the numerous channels and their wide range of parameters. Generally speaking, all everyday surfaces can be created using just a handful of these channels.
Use the Illumination channel in Surface Settings to enable or disable the generation and reception of Global Illumination (GI) to and from this surface, and to control the strength of the caustics effects.