Surface Shaders are shader nodes that provide surface effects, but do not fit into the Colour and Displacement categories.
A shader is a program or set of instructions used in 3D computer graphics to determine the final surface properties of an object or image. This can include arbitrarily complex descriptions of light absorption and diffusion, texture mapping, reflection and refraction, shadowing, surface displacement and post-processing effects. In Terragen 2 shaders are used to construct and modify almost every element of a scene.
The following 7 pages are in this category, out of 7 total.