Once I was captivated by the flow of brush strokes created by Flowfield Driven Drawing it was only a small step to explore which other flowfields might evoke beautiful drawings.
[space] switch flow map
 reset flow map position
[s] save image to disk
[d] dodge on/off
[b] brush on/off
[g] grain fine/rough
[l] lines short/long
[c] colors (daVinci, blackboard, crayons …)
[w] whirl direction
[x] more x-hatch
[z] less x-hatch
Check out the Codex Processianus Flickr Set for more results.
Since I have a long standing fascination with fractals, accompanied by a natural repulsion towards those rainbow colour palettes, that were so popular in the fractal art scene, I decided to use flow field driven design to create fractal drawings, in the style of Leonardo Da Vinci's Studies of water and flow.
The underlying flow fields were created using the same kind of trans- formations that are used in calculating the Mandelbrot and Julia set in fractal geometry.
Since flow fields are sampled at the pixel level, they can be saved as images or flowmaps, which represent the direction of flow as the hue of a pixel, and the speed of flow as saturation or brightness.