@Override
    @SuppressWarnings("unchecked")
    public void write(JmeExporter ex) throws IOException {
        OutputCapsule oc = ex.getCapsule(this);
        oc.write(numSamples, "numSamples", 0);
        oc.writeSavableArrayList(new ArrayList(filters), "filters", null);
    }
Returns the depth format currently used for the internal frame buffer's depth buffer

@return the depth format
jme3-core/src/main/java/com/jme3/post/FilterPostProcessor.java