public void setSunScale(float sunScale) {
        this.sunScale = sunScale;
        if (material != null) {
            material.setFloat("SunScale", sunScale);
        }
    }
Sets the scale of the sun for specular effect

@param sunScale the desired scale factor (default=3)
jme3-effects/src/main/java/com/jme3/water/WaterFilter.java