@Override
    public void write(JmeExporter ex) throws IOException {
        super.write(ex);
        OutputCapsule oc = ex.getCapsule(this);
        oc.write(edgeWidth, "edgeWidth", 1.0f);
        oc.write(edgeIntensity, "edgeIntensity", 1.0f);
        oc.write(normalThreshold, "normalThreshold", 0.5f);
        oc.write(depthThreshold, "depthThreshold", 0.1f);
        oc.write(normalSensitivity, "normalSensitivity", 1.0f);
        oc.write(depthSensitivity, "depthSensitivity", 10.0f);
        oc.write(edgeColor, "edgeColor", ColorRGBA.Black);
    }
Sets the edge color, default is black

@param edgeColor the desired color (alias created, default=(0,0,0,1))
jme3-effects/src/main/java/com/jme3/post/filters/CartoonEdgeFilter.java