title: How to select a complete node in forge viewer?
body: <p>In 3dsMax I can select a node,The result of selection is in this picture
  <a href="https://i.stack.imgur.com/oVBUS.png" rel="nofollow noreferrer">3ds</a>,But when I convert this model to svf format and select it in the forge viewer, it only selects part of it,like this <a href="https://i.stack.imgur.com/dPhtI.png" rel="nofollow noreferrer">forge</a>
  I don't know why this happens,Can someone tell me why this is? Thanks!</p>