<div dir="ltr"><div class="markdown-here-wrapper" style="font-family:"Lucida Sans",Cantarell,Verdana,sans-serif;color:rgb(11,83,148)"><p style="margin:0px 0px 1.2em!important">Does the issue exist only when depth peeling is enabled? Do you see it rendering correctly when depth peeling is disabled?</p>
<p style="margin:0px 0px 1.2em!important">Ensure that the color and depth buffers are preserved with the renderer :</p>
<pre style="font-size:0.95em;font-family:Consolas,Inconsolata,Courier,monospace;font-size:1em;line-height:1.2em;margin:1.2em 0px"><code class="hljs language-cpp" style="font-size:0.95em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(218,218,218);background-color:rgb(232,232,232);border-radius:3px;display:inline;white-space:pre;overflow:auto;border-radius:3px;border:1px solid rgb(204,204,204);padding:0.5em 0.7em;display:block!important;display:block;overflow-x:auto;padding:0.5em;background:rgb(240,240,240);color:black">_renderer->SetPreserveColorBuffer(<span class="hljs-number" style="color:rgb(0,136,0)">1</span>);
_renderer->SetPreserveDepthBuffer(<span class="hljs-number" style="color:rgb(0,136,0)">1</span>);
</code></pre>
<div title="MDH:RG9lcyB0aGUgaXNzdWUgZXhpc3Qgb25seSB3aGVuIGRlcHRoIHBlZWxpbmcgaXMgZW5hYmxlZD8g
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dWZmZXIoMSk7PC9kaXY+PGRpdj5gYGA8L2Rpdj48ZGl2Pjxicj48L2Rpdj4=" style="height:0;width:0;max-height:0;max-width:0;overflow:hidden;font-size:0em;padding:0;margin:0"></div></div></div><br><div class="gmail_quote"><div dir="ltr">On Fri, Oct 26, 2018 at 6:08 AM "Michel Mürner" <<a href="mailto:michelmuerner@gmx.ch">michelmuerner@gmx.ch</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-family:Verdana;font-size:12.0px"><div>
<p>The application I'm working on is based on Qt QML and I'm frequently using VTK via the vtkExternalOpenGLRenderWindow rendering to a QQuickFramebufferObject. Because semi-transparent geometries weren't rendered correctly I found out about the dual depth peeling and enabled it as recommended on the VTK website:</p>
<p><a href="https://www.vtk.org/Wiki/VTK/Examples/Cxx/Visualization/CorrectlyRenderTranslucentGeometry" rel="nofollow noreferrer" target="_blank">https://www.vtk.org/Wiki/VTK/Examples/Cxx/Visualization/CorrectlyRenderTranslucentGeometry</a></p>
<pre> _renderer = vtkSmartPointer<vtkRenderer>::New();
_renderer->SetUseDepthPeeling( 1 );
_renderer->SetMaximumNumberOfPeels( 100 );
_renderer->SetOcclusionRatio( 0.1 );
_renderWindow = vtkExternalOpenGLRenderWindow::New();
_renderWindow->SetAlphaBitPlanes( 1 );
_renderWindow->SetMultiSamples( 0 );
_renderWindow->AddRenderer( _renderer );
</pre>
<p>Unfortunately all I can see now is a red background. (Note: Red isn't a color I'm using for any objects or backgrounds)</p>
<p>The Versions I'm using are VTK Version 8.1.1 and Qt 5.11.2</p>
<p>Has anyone tried something similar with vtkExternalOpenGLRenderWindow, QQuickFramebufferObject and Dual Depth Peeling? Or an idea what might be the problem.</p>
</div></div></div>
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</blockquote></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div class="inbox-inbox-inbox-inbox-inbox-inbox-inbox-inbox-markdown-here-wrapper" style="font-family:"proza libre",sans-serif;color:rgb(0,56,107)"><h5 id="inbox-inbox-inbox-inbox-inbox-inbox-inbox-inbox-sankhesh-jhaveri" style="margin:1.3em 0px 1em;padding:0px;font-size:1.1em;border-bottom:1px solid rgb(238,238,238);font-weight:bold;color:rgb(11,65,148)">Sankhesh Jhaveri</h5>
<h6 id="inbox-inbox-inbox-inbox-inbox-inbox-inbox-inbox--sr-research-development-engineer-kitware-http-www-kitware-com-518-881-4417" style="margin:1.3em 0px 1em;padding:0px;font-size:1em;color:rgb(11,83,148);font-family:"open sans",sans-serif;font-weight:normal"><em>Sr. Research & Development Engineer</em> | <a href="http://www.kitware.com/">Kitware</a> | (518) 881-4417</h6>
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