ProfiledContourGeometry

[vin-ni]

I ended up doing

      if (i && i % 3 === 0) {
        // push only every nth vertice
        tempGeometry.push(pos);
      } else if (tempBuf.vertices.length - 1 === i) {
        // if its the last one, push it anyway
        tempGeometry.push(pos);
      }

and for the shape

const profileGeometry = new ShapeBufferGeometry(profileShape, 3); //12 is standard