# \#opengl

**URL:** https://discourse.paraview.org/tag/opengl/8.md

[Latest](https://discourse.paraview.org/latest.md) · [Categories](https://discourse.paraview.org/categories.md) · [Tags](https://discourse.paraview.org/tags.md)

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## [Getting libGLX.so.0 not found error with binary release of 5.6.1](https://discourse.paraview.org/t/getting-libglx-so-0-not-found-error-with-binary-release-of-5-6-1/2133)

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**Author:** [@tomF](https://discourse.paraview.org/u/tomF)\
**Replies:** 9\
**Last updated:** [November 10, 2025, 10:04am UTC](https://discourse.paraview.org/t/getting-libglx-so-0-not-found-error-with-binary-release-of-5-6-1/2133 "2025-11-10T10:04:36Z")

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Hi all, Following the blog entry about the release of version 5.6.1 as of last night (local time), I downloaded the Linux binary release tarBall (https://www.paraview.org/paraview-downloads/download.php?submit=Download&v…

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## [Is Paraview 6.0RC3 compiled with EGL support?](https://discourse.paraview.org/t/is-paraview-6-0rc3-compiled-with-egl-support/17017)

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**Author:** [@alessandro\_de\_maio](https://discourse.paraview.org/u/alessandro_de_maio)\
**Replies:** 1\
**Last updated:** [July 28, 2025, 5:34pm UTC](https://discourse.paraview.org/t/is-paraview-6-0rc3-compiled-with-egl-support/17017 "2025-07-28T17:34:23Z")

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Reading the release notes, it seems that now you can choose the rendering mode (at least with pvbatch) with the --opengl-window-backend but I’m wondering if the official 6.0RC3 has this capability or if that’s available …

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## [Possible race condition in QVTKOpenGLNativeWidget::initializeGL](https://discourse.paraview.org/t/possible-race-condition-in-qvtkopenglnativewidget-initializegl/16823)

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**Author:** [@qbisi](https://discourse.paraview.org/u/qbisi)\
**Replies:** 16\
**Last updated:** [July 7, 2025, 3:31pm UTC](https://discourse.paraview.org/t/possible-race-condition-in-qvtkopenglnativewidget-initializegl/16823 "2025-07-07T15:31:19Z")

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This is a bug when packaging paraview, vtk with nix/nixpkgs on darwin platform. You can reproduce the bug by running (on aarch64-darwin) nix build github:qbisi/nur-fem/7d748bdf7e3b132a90c56d524af016d5facbcd82#paraview …

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## [Trouble Running ParaView 5.13.3 on HPC Cluster: Missing libGL.so.1 and libglapi.so.0](https://discourse.paraview.org/t/trouble-running-paraview-5-13-3-on-hpc-cluster-missing-libgl-so-1-and-libglapi-so-0/16749)

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**Author:** [@Hemiao\_Zhang](https://discourse.paraview.org/u/Hemiao_Zhang)\
**Replies:** 5\
**Last updated:** [June 13, 2025, 11:18am UTC](https://discourse.paraview.org/t/trouble-running-paraview-5-13-3-on-hpc-cluster-missing-libgl-so-1-and-libglapi-so-0/16749 "2025-06-13T11:18:55Z")

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Hi all, I’m trying to install and run ParaView 5.13.3 on a Linux-based HPC system (Stanford’s Sherlock cluster), but I’m running into some shared library issues. I’ve tested both: The standard MPI Linux build: ParaVie…

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## [Headless superbuild failure due to missing OpenGL](https://discourse.paraview.org/t/headless-superbuild-failure-due-to-missing-opengl/15024)

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**Author:** [@ptee](https://discourse.paraview.org/u/ptee)\
**Replies:** 5\
**Last updated:** [May 30, 2025, 4:17pm UTC](https://discourse.paraview.org/t/headless-superbuild-failure-due-to-missing-opengl/15024 "2025-05-30T16:17:16Z")

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Hi, I am attempting to build headless paraview on a remote machine for client/server and pvbatch usage. This machine does not have a lot of the required dependencies, thus the choice of superbuild (specifically v5.11.1 …

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## [OpenGL problem in running paraview](https://discourse.paraview.org/t/opengl-problem-in-running-paraview/9438)

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**Author:** [@Zhuangz\_Zhang](https://discourse.paraview.org/u/Zhuangz_Zhang)\
**Replies:** 5\
**Last updated:** [February 26, 2025, 4:13pm UTC](https://discourse.paraview.org/t/opengl-problem-in-running-paraview/9438 "2025-02-26T16:13:35Z")

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Hello everyone, Recently, I tried installed paraview into my personal account in a server. I have downloaded the binary file in Download | ParaView, and the “ParaView-5.8.1-MPI-Linux-Python2.7-64bit” was downloaded. I …

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## [Post processing shader](https://discourse.paraview.org/t/post-processing-shader/16105)

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**Author:** [@Djolalo](https://discourse.paraview.org/u/Djolalo)\
**Replies:** 0\
**Last updated:** [February 4, 2025, 12:22pm UTC](https://discourse.paraview.org/t/post-processing-shader/16105 "2025-02-04T12:22:00Z")

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Hi folks ! I’ve wanted to implement bloom using a postprocessing shader (probably GPU Downsampling). I would’ve used openGL shading syntax since I know it’s the shading language used in Paraview, but I can’t find any g…

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## [Paraview OpenGL RenderWindow Crash on start](https://discourse.paraview.org/t/paraview-opengl-renderwindow-crash-on-start/15951)

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**Author:** [@MoonBridge](https://discourse.paraview.org/u/MoonBridge)\
**Replies:** 2\
**Last updated:** [January 6, 2025, 1:19pm UTC](https://discourse.paraview.org/t/paraview-opengl-renderwindow-crash-on-start/15951 "2025-01-06T13:19:45Z")

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Hey, I have been using OpenFOAM 11 with paraview but had to downgrade to ver. 10 due to work related issues. Since doing this paraview does not start up anymore. I tried reinstalling paraview in itself but it doesn’t se…

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## [Paraview not showing molecule](https://discourse.paraview.org/t/paraview-not-showing-molecule/15899)

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**Author:** [@Himanshu\_Sharma](https://discourse.paraview.org/u/Himanshu_Sharma)\
**Replies:** 6\
**Last updated:** [December 24, 2024, 9:57am UTC](https://discourse.paraview.org/t/paraview-not-showing-molecule/15899 "2024-12-24T09:57:01Z")

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I tried to open a Bohr-cml file in paraview. First time it showed the structure however agin second time when I opened it, it was showing only background

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## [Advanced replacement shaders](https://discourse.paraview.org/t/advanced-replacement-shaders/15622)

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**Author:** [@tjggriffin](https://discourse.paraview.org/u/tjggriffin)\
**Replies:** 22\
**Last updated:** [November 6, 2024, 11:16pm UTC](https://discourse.paraview.org/t/advanced-replacement-shaders/15622 "2024-11-06T23:16:43Z")

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Hello - I have some shader code that I am able to use in Shader Replacements. It seems to run without any errors, but it doesn’t do anything either. It contains a bunch of uniform variables and I can not figure how to s…

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## [paraview transparent effect, there are always uneven color blocks, how to eliminate](https://discourse.paraview.org/t/paraview-transparent-effect-there-are-always-uneven-color-blocks-how-to-eliminate/15269)

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**Author:** [@henrybolt](https://discourse.paraview.org/u/henrybolt)\
**Replies:** 2\
**Last updated:** [August 22, 2024, 11:35am UTC](https://discourse.paraview.org/t/paraview-transparent-effect-there-are-always-uneven-color-blocks-how-to-eliminate/15269 "2024-08-22T11:35:55Z")

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When open the opacity effect, the surface with edges type always show uneven color blocks, how to eliminate them?

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## [pvpython: bad X server connection](https://discourse.paraview.org/t/pvpython-bad-x-server-connection/849)

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**Author:** [@cdoucet](https://discourse.paraview.org/u/cdoucet)\
**Replies:** 8\
**Last updated:** [November 9, 2018, 4:28pm UTC](https://discourse.paraview.org/t/pvpython-bad-x-server-connection/849 "2018-11-09T16:28:47Z")

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Hello, I get the following error when I try to run a script with pvpython on a virtual machine (Ubuntu 16.04): ERROR: In /build/paraview-arsa8T/paraview-5.0.1+dfsg1/VTK/Rendering/OpenGL/vtkXOpenGLRenderWindow.cxx, line…

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## [Paraview texture buffer size (or driver) issue](https://discourse.paraview.org/t/paraview-texture-buffer-size-or-driver-issue/9575)

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**Author:** [@Umutcc](https://discourse.paraview.org/u/Umutcc)\
**Replies:** 4\
**Last updated:** [July 15, 2024, 12:33am UTC](https://discourse.paraview.org/t/paraview-texture-buffer-size-or-driver-issue/9575 "2024-07-15T00:33:53Z")

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Hello, I installed paraview using “sudo apt install paraview” command on ubuntu 20.04 which is installed on windows 11 pro wsl. It was working well for several weeks and since today when I try to load an openfoam case, …

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## [Select which GPU to use when starting ParaView](https://discourse.paraview.org/t/select-which-gpu-to-use-when-starting-paraview/3605)

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**Author:** [@ma-sadeghi](https://discourse.paraview.org/u/ma-sadeghi)\
**Replies:** 12\
**Last updated:** [June 28, 2024, 8:31am UTC](https://discourse.paraview.org/t/select-which-gpu-to-use-when-starting-paraview/3605 "2024-06-28T08:31:34Z")

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Hello, I have a workstation with two dissimilar GPUs. I only have one display, so expectedly, only one of the GPUs (GPU-1) is connected to my display. When I open ParaView -\> About, I see that ParaView only recognizes G…

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## [ParaView to Unreal Engine 5](https://discourse.paraview.org/t/paraview-to-unreal-engine-5/14885)

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**Author:** [@riowahab](https://discourse.paraview.org/u/riowahab)\
**Replies:** 4\
**Last updated:** [June 24, 2024, 12:53pm UTC](https://discourse.paraview.org/t/paraview-to-unreal-engine-5/14885 "2024-06-24T12:53:25Z")

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Hallo everyone, I am very new to ParaView. I want to know if there is a possibilities to do something like this,https://youtu.be/XVLTTO4tAIY?feature=shared Instead of using NVDIA, I want to use Unreal Engine. I tried t…

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## [Segmentation fault after recent update of Ubuntu 22.04](https://discourse.paraview.org/t/segmentation-fault-after-recent-update-of-ubuntu-22-04/13997)

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**Author:** [@kakila](https://discourse.paraview.org/u/kakila)\
**Replies:** 14\
**Last updated:** [June 10, 2024, 1:31pm UTC](https://discourse.paraview.org/t/segmentation-fault-after-recent-update-of-ubuntu-22-04/13997 "2024-06-10T13:31:41Z")

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After a resent update of ubuntu $ cat /var/log/apt/history.log ... Start-Date: 2024-02-20 18:50:20 Commandline: aptdaemon role='role-commit-packages' sender=':1.236' Upgrade: libglx-mesa0:amd64 (23.0.4-0ubuntu1~22.04.1…

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## [Help Needed with VTK and ParaView: Converting, Saving, and Rendering 3D Numpy Array](https://discourse.paraview.org/t/help-needed-with-vtk-and-paraview-converting-saving-and-rendering-3d-numpy-array/13526)

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**Author:** [@Davidlbit](https://discourse.paraview.org/u/Davidlbit)\
**Replies:** 10\
**Last updated:** [March 18, 2024, 5:48pm UTC](https://discourse.paraview.org/t/help-needed-with-vtk-and-paraview-converting-saving-and-rendering-3d-numpy-array/13526 "2024-03-18T17:48:59Z")

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Hi everyone, I’m a beginner seeking guidance on using VTK and ParaView. I have a specific problem and would appreciate your help. Objective: Convert a 3D numpy array to a VTI file. Save the VTI file to the hard drive…

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## [Off-screen MESA freezes for a large mesh](https://discourse.paraview.org/t/off-screen-mesa-freezes-for-a-large-mesh/13676)

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**Author:** [@robertsawko](https://discourse.paraview.org/u/robertsawko)\
**Replies:** 8\
**Last updated:** [January 12, 2024, 11:17pm UTC](https://discourse.paraview.org/t/off-screen-mesa-freezes-for-a-large-mesh/13676 "2024-01-12T23:17:00Z")

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Hello, I have a fairly large 3D mesh O(0.5B) cells in OpenFOAM and ParaView server built with superbuild with off-screen Mesa and another version built without superbuild with EGL-GPU rendering. When opening the mesh wi…

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## [Connection failed during handshake | vtkSocketCommunicator mismatch](https://discourse.paraview.org/t/connection-failed-during-handshake-vtksocketcommunicator-mismatch/13623)

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**Author:** [@Zoelle\_F\_Wong](https://discourse.paraview.org/u/Zoelle_F_Wong)\
**Replies:** 4\
**Last updated:** [January 4, 2024, 8:20am UTC](https://discourse.paraview.org/t/connection-failed-during-handshake-vtksocketcommunicator-mismatch/13623 "2024-01-04T08:20:58Z")

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Hello, I’m trying to visualize data remotely on a server from my work computer. I have to ssh twice to access my data. I’ve followed the instructions on Paraview on how to set up a forward connection over an ssh Tunnel…

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## [ParaView crashes intermittently](https://discourse.paraview.org/t/paraview-crashes-intermittently/13122)

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**Author:** [@vimalraj](https://discourse.paraview.org/u/vimalraj)\
**Replies:** 4\
**Last updated:** [October 27, 2023, 11:45am UTC](https://discourse.paraview.org/t/paraview-crashes-intermittently/13122 "2023-10-27T11:45:25Z")

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ParaView crashes intermittently when launched, happens about 50% of time. I use vglrun, to use the OpenGL rendering on NVIDIA GPUs. Can you please suggest a fix to this? Here’s the stack of the crash. $ vglrun paravi…

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## [pvrenderserver egl nvidia index with pvdataserver osmesa](https://discourse.paraview.org/t/pvrenderserver-egl-nvidia-index-with-pvdataserver-osmesa/12884)

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**Author:** [@Matteo\_Checcucci](https://discourse.paraview.org/u/Matteo_Checcucci)\
**Replies:** 2\
**Last updated:** [September 20, 2023, 11:14am UTC](https://discourse.paraview.org/t/pvrenderserver-egl-nvidia-index-with-pvdataserver-osmesa/12884 "2023-09-20T11:14:53Z")

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good morning, is there a way to make an osmesa compiled data server communicate with a rendering server configured with egl and nvidia index plugin? after launching the corresponding servers: user@node01:~$ mpiexec -np…

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## [ParaView (5.9.0) superbuild with mesa](https://discourse.paraview.org/t/paraview-5-9-0-superbuild-with-mesa/7117)

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**Author:** [@Jeff\_Becker](https://discourse.paraview.org/u/Jeff_Becker)\
**Replies:** 7\
**Last updated:** [September 13, 2023, 1:13am UTC](https://discourse.paraview.org/t/paraview-5-9-0-superbuild-with-mesa/7117 "2023-09-13T01:13:24Z")

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Hello, I’m trying to build ParaView with Qt and Mesa, and am getting the following build error. Any suggestions? Thanks. -Jeff Making all in targets/libgl-xlib CC xlib.lo CXXLD libGL.la clang-11: warning: argument …

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## [is shear stress calculated by paraview tangential?](https://discourse.paraview.org/t/is-shear-stress-calculated-by-paraview-tangential/12529)

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**Author:** [@Ahmadna94](https://discourse.paraview.org/u/Ahmadna94)\
**Replies:** 8\
**Last updated:** [July 21, 2023, 8:21pm UTC](https://discourse.paraview.org/t/is-shear-stress-calculated-by-paraview-tangential/12529 "2023-07-21T20:21:08Z")

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In my post-processing workflow with ParaView, I am calculating shear stress on each point using the velocity field. I would like to confirm whether the shear stress calculated by ParaView represents the tangential compon…

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## [Shaders in Python](https://discourse.paraview.org/t/shaders-in-python/12459)

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**Author:** [@tjggriffin](https://discourse.paraview.org/u/tjggriffin)\
**Replies:** 7\
**Last updated:** [July 21, 2023, 4:32pm UTC](https://discourse.paraview.org/t/shaders-in-python/12459 "2023-07-21T16:32:24Z")

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I am trying to write a script in Python 3 to use shaders (GLSL) in VTK. When I google, I see a lot of stuff that does not seem to be valid anymore. I see mention of: vtkShader vtkShaderProgram vtkShader2 vtkShader2C…

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## [Draw Cylinder & Curved Shapes in VTKUnStructuredGrid](https://discourse.paraview.org/t/draw-cylinder-curved-shapes-in-vtkunstructuredgrid/12541)

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**Author:** [@anshakeel](https://discourse.paraview.org/u/anshakeel)\
**Replies:** 9\
**Last updated:** [July 19, 2023, 9:24pm UTC](https://discourse.paraview.org/t/draw-cylinder-curved-shapes-in-vtkunstructuredgrid/12541 "2023-07-19T21:24:15Z")

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Q1: I’m trying to generate VTK data. I have some Data that have cylindrical shapes like pipes and bends. I would like to convert them to VTK format. To achieve this, I am using VtkUnstructuredGrid.I searched thoroughly o…

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## [Is there any documents or examples for Custom shader / Shader Replacement?](https://discourse.paraview.org/t/is-there-any-documents-or-examples-for-custom-shader-shader-replacement/1423)

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**Author:** [@ymjia](https://discourse.paraview.org/u/ymjia)\
**Replies:** 3\
**Last updated:** [June 28, 2023, 7:05pm UTC](https://discourse.paraview.org/t/is-there-any-documents-or-examples-for-custom-shader-shader-replacement/1423 "2023-06-28T19:05:03Z")

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I am trying to shading a point cloud in point gaussian representation. But I cannot figure out how to get vertex normal or how to get camera position through shader replacement/ custom shader. Could someone give me som…

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## [Use GLSL Shader in ParaView](https://discourse.paraview.org/t/use-glsl-shader-in-paraview/12367)

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**Author:** [@michaelsz](https://discourse.paraview.org/u/michaelsz)\
**Replies:** 0\
**Last updated:** [June 22, 2023, 1:42pm UTC](https://discourse.paraview.org/t/use-glsl-shader-in-paraview/12367 "2023-06-22T13:42:33Z")

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I have been attempting to utilize GLSL shaders in ParaView. I have researched and seen the shader replacement feature but am confused about if it is only able to replace preset portions of the default shader code and wh…

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## [Building ParaView 5.10.1 with onscreen and offscreen support](https://discourse.paraview.org/t/building-paraview-5-10-1-with-onscreen-and-offscreen-support/12292)

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**Author:** [@DeX97](https://discourse.paraview.org/u/DeX97)\
**Replies:** 1\
**Last updated:** [June 12, 2023, 4:53pm UTC](https://discourse.paraview.org/t/building-paraview-5-10-1-with-onscreen-and-offscreen-support/12292 "2023-06-12T16:53:56Z")

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Hi, I am trying to build ParaView 5.10.1 from source with support for both onscreen and offscreen rendering. I used the ParaView and Offscreen Rendering page as a reference. I have a Debian 10 system. To build ParaView…

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## [Paraview is closed by Windows 10](https://discourse.paraview.org/t/paraview-is-closed-by-windows-10/11870)

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**Author:** [@Sergey\_Kurchev](https://discourse.paraview.org/u/Sergey_Kurchev)\
**Replies:** 8\
**Last updated:** [April 16, 2023, 1:36am UTC](https://discourse.paraview.org/t/paraview-is-closed-by-windows-10/11870 "2023-04-16T01:36:33Z")

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We are working on ESC with Windows 10. We launched a python file from a virtual environment with praview. The program returned an error: “(84.017s) \[paraview \]vtkWin32OpenGLRenderWin:680 ERR| vtkWin32OpenGLRenderWindow …

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## [Creating a mesh editing plugin for paraview ?](https://discourse.paraview.org/t/creating-a-mesh-editing-plugin-for-paraview/11774)

<div class="topic-metadata">

**Author:** [@Mehdi\_Hamidi](https://discourse.paraview.org/u/Mehdi_Hamidi)\
**Replies:** 4\
**Last updated:** [April 10, 2023, 9:26am UTC](https://discourse.paraview.org/t/creating-a-mesh-editing-plugin-for-paraview/11774 "2023-04-10T09:26:29Z")

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Hi, I intend to create a mesh editing plugin for ParaView that will allow users to perform interactive editing of mesh objects in real-time. The goal is to avoid the need to transport the vtk/msh mesh from one software …

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