|
A shader or shader function can loosely be defined as a generic C-code function that calculates some aspect of the rendering environment such as a pixel's background color or the effect of a surface's transparency on the color of a pixel. Each shader uses a named list of arguments. For example, the material reflectance shader named
metal has three arguments,
ambient factor,
specular factor, and roughness. Shaders are categorized into several different shader classes, with each shader class being applied in a particular circumstance, such as the background shader class.
|