public void setEdgeWidth(float edgeWidth) {
        this.edgeWidth = edgeWidth;
        if (material != null) {
            material.setFloat("EdgeWidth", edgeWidth);
        }
    }
sets the width of the edge in pixels default is 1

@param edgeWidth the desired width (in pixels, default=1)
jme3-effects/src/main/java/com/jme3/post/filters/CartoonEdgeFilter.java