The variety of pastel tones is evoked with a procedural texture
. "Chaos," by Peter Schroder, is the left panel of "The Gold Triptych-Artifacts from an alien religious site." This piece was computed on a massively parallel computer, and the software uses symbolic mathematical and procedural representations for generating the images.
The shading texts reviews the basics of the guide and offers chapters on the shading languages built-in functions, shader development, stored and procedural texture
shaders, lighting, shadows, surface characteristics, noise, animation, antialiasing procedural textures
, non-photorealisitic shaders, shaders for imaging, and language comparison.