Voronoi
Relaxed Voronoi cells filled with nested insets, hatching or outlines.
Pens
Neighboring cells form color regions, or colors follow fill style. Starts with 4 pens and works with anywhere from 1 to 8.
Settings
Cells, Relaxation, Seeds, Density contrast, Cluster size (mm), Style, Line spacing (mm), Gap (mm), Corner rounding, Outline hatched cells, Pen per.
The preview uses the default settings on A4. Press R in the app for random variations. The SVG export is in millimetres with one Inkscape layer per pen, so it works with the AxiDraw extension, vpype and saxi.