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</o:shapelayout></xml><![endif]--></head><body lang=SK link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>I think you need to set stencil buffer size using these calls<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>QSurfaceFormat surfaceFormat = ui->qvtkWidget->windowHandle()->format();<o:p></o:p></span></p><p class=MsoNormal><a name=mainwindow.cpp-16></a><a name=mainwindow.cpp-17></a><span style='font-size:10.0pt;font-family:"Courier New"'>surfaceFormat.setStencilBufferSize(8);<o:p></o:p></span></p><p class=MsoNormal><a name=mainwindow.cpp-18></a><span style='font-size:10.0pt;font-family:"Courier New"'>ui->qvtkWidget->windowHandle()->setFormat(surfaceFormat);<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>Robert<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> vtkusers [mailto:vtkusers-bounces@vtk.org] <b>On Behalf Of </b>Alexandre Boucher<br><b>Sent:</b> Tuesday, December 20, 2016 6:48 AM<br><b>To:</b> vtkusers@vtk.org<br><b>Subject:</b> [vtkusers] opengl2 vtk rendering back end and Qt<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Hi All,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I am having a problem using the opengl2 backend with QVTKWidget (I tried Qt 5.4 to 5.7 and vtk 7.0 and 7.1). When looking at a simple vtkImageData for instance some of the faces of the grid are not properly displayed, see image below. Everything works fine with the opengl1 backend.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I also try using QVTKWidget2, but I am getting a crash when the widget call OpenGLInitState().<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Is there a trick to use Qt and opengl2?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Thanks<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><img width=527 height=440 style='width:5.4895in;height:4.5833in' id="_x0000_i1025" src="cid:image001.png@01D25A95.CBC8FF20" alt="Inline image 1"><o:p></o:p></p></div></div></div></body></html>