title: How to take snapshot From node which is not on the scene
body: <p>This is the case:</p>
  
  <p>I have a <code>Mesh</code> and <code>PointLight</code> added to the pane and I want to take snapshot from pane and show the result in the image view. But it only works when I add the pane to the scene.</p>
  
  <p>Is there any way to take snapshot from a node which has been not added to the scene?</p>