docs: protected void captureCenterEye(GVRRenderTarget renderTarget, boolean isMultiview) {
          if (mScreenshotCenterCallback == null) {
              return;
          }
  
          // TODO: when we will use multithreading, create new camera using centercamera as we are adding posteffects into it
          final GVRCamera centerCamera = mMainScene.getMainCameraRig().getCenterCamera();
          final GVRMaterial postEffect = new GVRMaterial(this, GVRMaterial.GVRShaderType.VerticalFlip.ID);
  
          centerCamera.addPostEffect(postEffect);
  
          GVRRenderTexture posteffectRenderTextureB = null;
          GVRRenderTexture posteffectRenderTextureA = null;
  
          if(isMultiview) {
              posteffectRenderTextureA = mRenderBundle.getEyeCapturePostEffectRenderTextureA();
              posteffectRenderTextureB = mRenderBundle.getEyeCapturePostEffectRenderTextureB();
              renderTarget = mRenderBundle.getEyeCaptureRenderTarget();
              renderTarget.cullFromCamera(mMainScene, centerCamera ,mRenderBundle.getShaderManager());
              renderTarget.beginRendering(centerCamera);
          }
          else {
              posteffectRenderTextureA = mRenderBundle.getPostEffectRenderTextureA();
              posteffectRenderTextureB = mRenderBundle.getPostEffectRenderTextureB();
          }
  
          renderTarget.render(mMainScene,centerCamera, mRenderBundle.getShaderManager(), posteffectRenderTextureA, posteffectRenderTextureB);
          centerCamera.removePostEffect(postEffect);
          readRenderResult(renderTarget, EYE.MULTIVIEW, false);
  
          if(isMultiview)
              renderTarget.endRendering();
  
          final Bitmap bitmap = Bitmap.createBitmap(mReadbackBufferWidth, mReadbackBufferHeight, Bitmap.Config.ARGB_8888);
          mReadbackBuffer.rewind();
          bitmap.copyPixelsFromBuffer(mReadbackBuffer);
          final GVRScreenshotCallback callback = mScreenshotCenterCallback;
          Threads.spawn(new Runnable() {
              public void run() {
                  callback.onScreenCaptured(bitmap);
              }
          });
  
          mScreenshotCenterCallback = null;
      }