Hi, how do you invoke "refresh" of viewport ? Do you have some <span class="J-JK9eJ-PJVNOc" style="background-color:yellow">recomputation</span> related to it ? Is this conversion to <span class="J-JK9eJ-PJVNOc" style="background-color:yellow">polydata</span> realised only once ? Do you see at least once correctly rendered data ? How long take show data, without this refresh ?<div>
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