@Override
    public void read(JmeImporter im) throws IOException {
        super.read(im);
        InputCapsule ic = im.getCapsule(this);
        sampleDist = ic.readFloat("sampleDist", 1.0f);
        sampleStrength = ic.readFloat("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