title: Convert JavaFX Node, Group or Shape3D to Mesh
body: <p>Is there any possible way to convert JavaFX <code>Node</code>, <code>Group</code>, or <code>Shape3D</code> to <code>Mesh</code>?</p>
  
  <p>I need this to export my scene to '.obj' and the only exporter I found (in FXyz library) requires <code>Mesh</code>.  </p>