        return;
                } else if (this.display === DisplayOptions.Matcap1) {
                    scene.overrideMaterial = this.matcap1Material;
                    renderer.setRenderTarget(null);
                    renderer.clear();
                    renderer.render(scene, camera);
                    this.restoreRendererState();
                    return;
                } else if (this.display === DisplayOptions.Matcap2) {
                    scene.overrideMaterial = this.matcap2Material;
   