Dual Frequency Surfaces
Lower Frequency Surface
Addition of Intermediate Frequency Surface
Addition of High Frequency Surface
Surface/Mesh Structure of the above surfaces
The surface may be sliced into ribbons
A pleated surface is formed by constructing an edge pleat, then sweeping it along two curves
Surfaces consist of figures with various spacings.
The figure spacing may be thought of as a spatial frequency.
By randomly grouping figures at different spatial frequencies, more sophisticated surface textures may be produced.
In general, for lower frequency textures, a Perlin noise function works better as the noise is somewhat grouped.
For higher frequencies, a random function may be used, which represents white noise, like a radio that is out of tune.