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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Switching to the old peeling implementation did the trick, no more issues and yes I am using remote rendering via pvserver.<o:p></o:p></span></p>
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<b><span lang="FR" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Łukasz Paluszek</span></b><span lang="FR" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
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<span lang="FR" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Airbus Helicopters</span><span lang="FR" style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p></o:p></span></p>
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<span lang="FR" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Aerodynamics Department (ETGA)</span><span lang="FR" style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p></o:p></span></p>
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<span lang="FR" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">86607 Donauwörth</span><b><span lang="FR" style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p></o:p></span></b></p>
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<span lang="FR" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Germany</span><span lang="FR" style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
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<span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Tel.: +49 (90) 671 8231<o:p></o:p></span></p>
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<span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Fax.: +49 (90)
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">671 9122</span><span style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"><a href="mailto:Lukasz.Paluszek@airbus.com">Lukasz.Paluszek@airbus.com</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> David Lonie [mailto:david.lonie@kitware.com]
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<b>Sent:</b> 24 June 2016 21:22<br>
<b>To:</b> Paluszek, Lukasz<br>
<b>Cc:</b> paraview@paraview.org<br>
<b>Subject:</b> Re: [Paraview] Opacity Issues<o:p></o:p></span></p>
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<p class="MsoNormal">On Fri, Jun 24, 2016 at 2:15 PM, David Lonie <<a href="mailto:david.lonie@kitware.com" target="_blank">david.lonie@kitware.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">On Fri, Jun 24, 2016 at 1:10 PM, Paluszek, Lukasz <<a href="mailto:lukasz.paluszek@airbus.com" target="_blank">lukasz.paluszek@airbus.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">It doesn’t happen all the time, I suppose you need a fairly large surface dataset. I managed to reproduce
the problem on a wavelet source (attached state file), try increasing the number of elements if you do not see any artifacts. I have bult Paraview from source on OpenSuse 13.1 but also cross-checked with the Linux binaries from Paraview.org and had same issues.
There was no problem with the osmesa-llvm flavor though.</span><o:p></o:p></p>
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<p class="MsoNormal">I couldn't reproduce this here on arch linux with a newer nVidia driver (367.27), so I'm suspicious that this is a driver bug that's affecting the new depth peeling implementation.<o:p></o:p></p>
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<p class="MsoNormal">Since you're building from source, can you try editing VTK/Rendering/OpenGL2/vtkOpenGLRenderer.cxx, and change line 322<o:p></o:p></p>
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<p class="MsoNormal">if (dualDepthPeelingSupported)<o:p></o:p></p>
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<p class="MsoNormal">to<o:p></o:p></p>
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<p class="MsoNormal">if (false)<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">in <i>DeviceRenderTranslucentPolygonalGeometry</i>, recompile using the OpenGL2 backend, and let me know if the issue goes away? I suspect it will since both the OpenGL1 backend and OpenGL2 mesa/llvm do not use the new code. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I'll put together a patch to force the older peeling implementation via an environment variable to make the work-around easier to apply.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Patch is here: <a href="https://gitlab.kitware.com/vtk/vtk/merge_requests/1589">https://gitlab.kitware.com/vtk/vtk/merge_requests/1589</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">By the way, are you running paraview with remote rendering via pvserver? I was just made aware of a similar issue with remote rendering and depth peeling.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Dave<o:p></o:p></p>
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