New filter Artistic / Polygonize [delaunay] available in the G'MIC plug-in for +GIMP !
This filter makes your image look like a triangulation, and the different options allows to render very different results. It basically computes the Delaunay triangulation of sample points located on the edges. I like it ! Press the Update filters button and you can play with it right now.

PS : The previous Polygonize method has been renamed as Polygonize [energy], but is still available.
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