public void setEdgesThickness(int edgesThickness) {
        this.edgesThickness = Math.max(1, Math.min(edgesThickness, 10));
        this.edgesThickness *= 0.1f;
        postshadowMat.setFloat("PCFEdge", edgesThickness);
    }
Sets the shadow edge thickness. Default is 1. Setting it to lower values
can help to reduce the jagged effect of the shadow edges.
@param edgesThickness the shadow edge thickness.
jme3-vr/src/main/java/com/jme3/shadow/AbstractShadowRendererVR.java