Not sure it's already available out of the box, you can certainly achieve this manually in all engine, but I would love to see a Class for polygon tessellation, advanced textured polygons rendering (strip, border, fill Local/absolute, etc.), fast polygons Math (culling, averages, trigo, etc.), directly linked to box2d edge chain.
Well you got the idea: A completePolygons Class
(not simply tris, quad or concave).
Also : a native exporter like in construct 1 for speed reasons :)