}
List<VectorXYZ> vs = createTriangleStripBetween(
upperHoleRing, lowerHoleRing);
Material groundMaterial = Materials.EARTH.makeSmooth();
target.drawTriangleStrip(groundMaterial, vs,
texCoordLists(vs, groundMaterial, STRIP_WALL));
target.drawConvexPolygon(groundMaterial, lowerHoleRing,