public void setScale(float scale) {
        this.scale = scale;
        if (ssaoMat != null) {
            ssaoMat.setFloat("Scale", scale);
        }
    }
Returns the distance between occluders and occludee. default 0.2f

@param scale the desired distance (default=0.2)
jme3-effects/src/main/java/com/jme3/post/ssao/SSAOFilter.java