In Fractal Cylinder 2, curves are drawn along waist curves, colored by a radial gradient. Low alpha values create differing densities and transparency.
In Intersecting Fractal Cylinders, two solid cylinders with separate radial gradient colorings sweep across the canvas as they intersect.
These images are based on morphing between curves defined by a randomized fractal subdivision process. This subdivision process is used to define functions mapping the unit interval to itself, which are in turn used to define a sequence of "noisy" circles. A closed cylindrical object is defined by allowing a closed curve to morph from one of these circles to the next, using a cosine function for smooth interpolation. The result is an object which marries jaggedness in one direction with differentiability in a perpendicular direction.
In Fractal Cylinder 1, curves are drawn along the length of the cylinder rather than along waist curves. The changing color of the lines is controlled by a randomized fractal subdivision function. Additive color blending produces the lighting effect.