@Override
        public void onAction(String name, boolean pressed, float tpf) {
            if (name.equals("wireframe") && !pressed) {
                wireframe = !wireframe;
                if (wireframe) {
                    terrain.setMaterial(matWire);
                } else {
                    terrain.setMaterial(matTerrain);
                }
            }
        }
Demonstrates the NeighbourFinder interface for TerrainQuads,
allowing you to tile terrains together without having to use
TerrainGrid. It also introduces the MultiTerrainLodControl that
will seam the edges of all the terrains supplied.

@author sploreg
jme3-examples/src/main/java/jme3test/terrain/TerrainTestTile.java