               this.screen.material = this.luminosityMaterial;
                    this.screen.material.blending = AdditiveBlending;
                    renderer.render(this.screen, this.screenCamera);
                    this.screen.material.blending = NoBlending;
                    this.restoreRendererState();
                    return;
                } else {
                    this.screen.material = this.luminosityMaterial;
                    renderer.setRenderTarget(renderTargetBright);
          