title: Detect a horizontal plane using ARKIT and capture its image
body: <p>I am already detecting the horizontal planes in my AR app using ARKit and SceneKit.</p>
  
  <pre><code>let configuration = ARWorldTrackingConfiguration()
  configuration.planeDetection = .horizontal
  sceneView.session.run(configuration)
  sceneView.delegate = self
  </code></pre>
  
  <p>This calls the delegate method on plane detection.</p>
  
  <pre><code>func renderer(_ renderer: SCNSceneRenderer, didAdd node: SCNNode, for anchor: ARAnchor) {
              // 1
              guard let planeAnchor = anchor as? ARPlaneAnchor else { return }
  
              // 2
              let width = CGFloat(planeAnchor.extent.x)
              let height = CGFloat(planeAnchor.extent.z)
  
              let plane = SCNPlane(width: width, height: height)
  
      }
  </code></pre>
  
  <p>But is there any way that I can get the plane surface which was detected and capture its image somehow ?</p>