These are the steps how it was created.

• Downloaded a JPEG of moderate resolution.
• Digitized with inkscape-centerline trace from https://github.com/fablabnbg/inkscape-centerline-trace/releases
• Separated an outline stroke and a filled body shape in inkscape.
• Extruded the body shape as filled area and the outline as stroke with line width in two different heights using https://github.com/fablabnbg/inkscape-paths2openscad/releases
• Done.

Next time I'll use my bamboo tablet and try to draw something myself. But how should that compare to great artists like Otto Waalkes. Sigh :-)