message: only call renderBlendedTransparent when needed
diff: @@ -230,8 +230,10 @@ export class DrawPass {
  }
  }
  + if (scene.opacityAverage < 1) {
  renderer.renderBlendedTransparent(scene.primitives, camera, null);
  }
  + }
  private _render(renderer: Renderer, camera: ICamera, scene: Scene, helper: Helper, toDrawingBuffer: boolean, props: Props) {
  const volumeRendering = scene.volumes.renderables.length > 0;
  