@Override
    public void cloneFields(final Cloner cloner, final Object original) {
        material = cloner.clone(material);
        shadowRenderer = cloner.clone(shadowRenderer);
        shadowRenderer.setPostShadowMaterial(material);
    }
Read the size of each shadow map rendered by this filter.

@return a map's height (which is also its width, in pixels)
jme3-core/src/main/java/com/jme3/shadow/AbstractShadowFilter.java