@Override
    protected Material getMaterial() {

        return material;
    }
Create a fog filter 
@param fogColor the color of the fog (default is white)
@param fogDensity the density of the fog (default is 0.7)
@param fogDistance the distance of the fog (default is 1000)
jme3-effects/src/main/java/com/jme3/post/filters/FogFilter.java