@Override
    public TerrainQuad getTerrainQuadAt(Vector3f location) {
        HeightMap heightMapAt = getHeightMapAt(location);
        TerrainQuad q = new TerrainQuad("Quad" + location, patchSize, quadSize, heightMapAt == null ? null : heightMapAt.getHeightMap());
        return q;
    }
Affects the vertical scale of the terrain when loaded.
jme3-terrain/src/main/java/com/jme3/terrain/geomipmap/grid/ImageTileLoader.java