Hi,<br> <br> I have a problem with vtkRenderWindow. I create a vtkRenderWindow (dispatched) in my Tcl application. But, when i resize this vtkRenderWindow, the image in viewport disapear, when i change the focus to other window,&nbsp; the image in&nbsp; viewport disapear too. Any idea?<br> <br> thank's!<br> <BR><BR>/(        )`<br>                              \ \___   / |<br>                              /- _  `-/  '<br>                             (/\/ \ \   /\<br>                             / /   | `    \<br>                             O O   ) /     |<br>                             `-^--'`&lt;      '<br>                             (_.)  _  )   /<br>                             `.___/`    / <br>                               `-----' /<br>                  &lt;----.     __ / __   \<br>                  &lt;----|====O)))==) \) /====<br>                  &lt;----'    `--' `.__,' \<br>                                |        |<br>                                \       / 
      /\<br>                          ______( (_  / \______/<br>                         ,'  ,-----'   |  Jan Palach, programador:<br>                         `--{__________)  Python, C/C++<p>&#32;__________________________________________________<br>Fale com seus amigos  de graça com o novo Yahoo! Messenger <br>http://br.messenger.yahoo.com/