public void setDistortionScale(float value) {
        distortionScale  = value;
        material.setFloat("distortionScale", distortionScale);
    }
Sets the scale of distortion by the normal map, default = 0.2

@param value the desired scale factor (default=0.2)
jme3-effects/src/main/java/com/jme3/water/SimpleWaterProcessor.java