Closed fractal polygons. Width variation comes from bounding back to the first node from the last with fractals dialled up slightly on the way back.

So I picked area 19 of the October community challenge. And this is the current progress of my getting in way over my head. I figured it would make an excellent opportunity to further the Castellfollit approach on the encounter map format (and will probably live to regret it).

Thank you, @Raiko! Yes, this was all CC3: the paperlike texture is the background bitmap from the Watecolour and the rest is just polygons, applying the principles from the same annual.

The gauntlet was dropped in the Facebook group to do something about the town of Castellfollit de la Roca.