Program-generated cartoon has lines on canvas .c with option -smooth raw such that they render as cubic bezier.
If there are more than 1 bezier sequence, then the line width varies wildly at the limb points.
Demonstration: create canvas .c, then source manneken.dump, then say .c postscript, then watch the result.
Compare with manneken.ps
If there are questions, mail to wolf-dieter.busch@gmx.de
SVG demonstrating what I expect