@Override
    protected DistanceLodCalculator makeLodCalculator() {
        return new DistanceLodCalculator(65, 2.7f);
    }
An extension of the TerrainLodControl that handles
multiple terrains at once. This is to be used if you 
have your own tiling/paging terrain system, such as
TerrainGrid.

@author Brent Owens
jme3-terrain/src/main/java/com/jme3/terrain/geomipmap/MultiTerrainLodControl.java