We want to manipulate every face individually, so we have to “break up” the mesh into individual primitive pieces. Use a facet operator, with “unique point” turned on. Then, use a primitive operator to do stuff, like scaling, which will get us: Add a point to the center of each primitive Run a Wrangle SOP over primitives and simply add a point at each position: int pt = addpoint(0, @P); setpointgroup(0, "centroids", pt, 1); // group just in case Which gives us this: