I am observing the documentation page for the freestyle SVG exporter, and would like to know how to reproduce the effect demonstrated in the header image, shown below. I am specifically interested in the effect demonstrated on the Suzanne model, not necessarily the background.

I am frankly lost as to where to even begin, considering the fact that the model's edges do not follow this consistent pattern, and thus I cannot use edge-marking.
I'm fairly new to freestyle, and so any help would be appreciated, thanks.