geom.setOptimization(Optimization.USE_DISPLAY_LISTS);
terrainShape.setGeometry(geom);
Appearance app = new Appearance();
app.setMaterial(new Material());
app.getMaterial().setDiffuseColor(new Colorf(0.6313726f, 0.28627452f, 0.07058824f));
terrainShape.setAppearance(app);
}