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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Hi,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I downloaded the ParaView Binary Installers (ParaView-5.4.0-Qt5-OpenGL2-Windows-64bit.exe) from <a href="https://www.paraview.org/download/">https://www.paraview.org/download/</a> and installed it on my Thinkpad T430 which is running Windows 10. I was using ParaView for the first time and found two things puzzling:<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l1 level1 lfo2'><![if !supportLists]><span style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>When I open ParaView, the default window looks like the following. There is a small black square on the bottom left corner in RenderView1 (circled in red). I couldn’t figure out why it showed up there.<o:p></o:p></p><p class=MsoListParagraph> <img border=0 width=1601 height=908 id="Picture_x0020_1" src="cid:image001.png@01D2F1EE.FA0D45D0"><o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l1 level1 lfo2'><![if !supportLists]><span style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Then I opened the first Example Visualization and selected Clip2 under can.ex2. When I tried to adjust the Opacity under Styling in the Properties tab, any value other than 1 will make the object in the RenderView1 window disappear like the following:<o:p></o:p></p><p class=MsoListParagraph><img border=0 width=1600 height=908 id="Picture_x0020_2" src="cid:image002.png@01D2F1F1.6B4CBFD0"><o:p></o:p></p><p class=MsoListParagraph>I tried other examples, and similar things happened. I couldn’t figure out why.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Does anybody know what might be going on and how I can fix it?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal>Yu<o:p></o:p></p></div></body></html>