I had the same problem! Calling Render() on the Renderer should work...<br><br>From Documentation:<br><br>********<br><table class="memname"><tbody><tr><td class="memname">virtual void vtkRenderer::Render </td>
<td>(</td>
<td class="paramname"><br></td>
<td> ) </td>
<td><code> [virtual]</code></td>
</tr>
</tbody></table>
<div class="memdoc">
<p>Create an image. This is a superclass method which will in turn call the DeviceRender method of Subclasses of <a class="el" href="http://www.vtk.org/doc/nightly/html/classvtkRenderer.html" title="abstract specification for renderers">vtkRenderer</a></p>
<p><br></p><table class="memname"><tbody><tr><td class="memname">virtual void vtkRenderWindow::Render </td>
<td>(</td>
<td class="paramname"><br></td>
<td> ) </td>
<td><code> [virtual]</code></td>
</tr>
</tbody></table>
<div class="memdoc">
<p>Ask each renderer owned by this RenderWindow to render its image and synchronize this process. </p>
<p>Implements <a class="el" href="http://www.vtk.org/doc/nightly/html/classvtkWindow.html#acb783e66948656035da1bc0bf747c13a">vtkWindow</a>.</p>
<p>Reimplemented in <a class="el" href="http://www.vtk.org/doc/nightly/html/classvtkXMesaRenderWindow.html#abb3258748e55ad41f3d6a6c4b145814c">vtkXMesaRenderWindow</a>, and <a class="el" href="http://www.vtk.org/doc/nightly/html/classvtkXOpenGLRenderWindow.html#a33183ba56fc43126a34d2d82b1289988">vtkXOpenGLRenderWindow</a>.</p>
</div><p> </p>
</div>********<br><br>My RenderWindow has only one Renderer. <br>So, RenderWindow->Render() should be the same as Renderer->Render(), according to the documentation...<br><br><br><br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="im">
<br>
</div>I was calling Render() on the Renderer - I changed to calling Render()<br>
on the RenderWindow and it behaves as I would expect.<br>
<br>
This is the kind of thing that seems very confusing...<br>
<div><div class="h5"><br>
Thanks,<br>
<br>
David<br>
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