Op-Art Warp
Vasarely bulges: hatched checkerboards, grids and stripes swelling out of the page.
Pens
Color bands follow the woven directions and warped stripes. Starts with 4 pens and works with anywhere from 1 to 8.
Settings
Style, Cells across, Line spacing (mm), Hatch every cell, Bulges, Strength, Radius (% of short side), Centre x (%), Centre y (%).
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.