Procedural texture

[2] These kinds of textures are often used to model surface or volumetric representations of natural elements such as wood, marble, granite, metal, stone, and others.

Usually, the natural look of the rendered result is achieved by the usage of fractal noise and turbulence functions[definition needed].

Consequently, solid textures are unaffected by distortions of the surface parameter space, such as you might see near the poles of a sphere.

Solid textures will remain consistent and have features of constant size regardless of distortions in the surface coordinate systems.

Starting from a simple white noise, self-organization processes can lead to structured patterns while preserving some randomness.

These systems may show behaviors similar to real processes (Morphogenesis) found in nature, such as animal markings (shells, fish, wild cats...).