_pssmPass.getShadowOffsetState().setUnits(4.0f);
// _pssmPass.setDrawDebug(true);
// TODO: backside lock test
final Quad floor = new Quad("floor", 2048, 2048);
floor.updateModelBound();
floor.setRotation(new Quaternion().fromAngleAxis(MathUtils.HALF_PI, Vector3.UNIT_X));
floor.setTranslation(1024, 0, 1024);
terrainNode.attachChild(floor);
_pssmPass.addBoundsReceiver(terrainNode);