@Override
    public void write(JmeExporter ex) throws IOException {
        super.write(ex);
        OutputCapsule oc = ex.getCapsule(this);
        oc.write(sampleDist, "sampleDist", 1.0f);
        oc.write(sampleStrength, "sampleStrength", 2.2f);
    }
sets the sample strength default is 2.2

@param sampleStrength the desired strength (default=2.2)
jme3-effects/src/main/java/com/jme3/post/filters/RadialBlurFilter.java