# Support

**URL:** https://discourse.vtk.org/c/support/6.md?page=5

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

**Page:** 6

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## [Incorrect viewport is zoomed with trame.widgets.vtklocal.LocalView](https://discourse.vtk.org/t/incorrect-viewport-is-zoomed-with-trame-widgets-vtklocal-localview/16035)

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**Author:** [@senanokah](https://discourse.vtk.org/u/senanokah)\
**Replies:** 4\
**Last updated:** [September 19, 2025, 11:45am UTC](https://discourse.vtk.org/t/incorrect-viewport-is-zoomed-with-trame-widgets-vtklocal-localview/16035 "2025-09-19T11:45:44Z")

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Hi! First of all, thank you so much for your work on Trame/VTK/WASM. I’ve got an issue where zooming while hovering the cursor over different render viewports always zoomes the first renderer. I’m using the LocalView f…

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## [Building vtkbool as a remote module does not seem to complete.](https://discourse.vtk.org/t/building-vtkbool-as-a-remote-module-does-not-seem-to-complete/16043)

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**Author:** [@chir-set](https://discourse.vtk.org/u/chir-set)\
**Replies:** 11\
**Last updated:** [September 17, 2025, 1:30pm UTC](https://discourse.vtk.org/t/building-vtkbool-as-a-remote-module-does-not-seem-to-complete/16043 "2025-09-17T13:30:18Z")

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Hello, I am trying to build vtkbool as a remote module of VTK 9.5 within Slicer’s build tree. This vkbool.remote.cmake file is used: # # vtkbool Classes # vtk\_fetch\_module(vtkbool “Boolean operations on polydata” G…

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## [Relative depth between surfaces and lines](https://discourse.vtk.org/t/relative-depth-between-surfaces-and-lines/16023)

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**Author:** [@Jellby](https://discourse.vtk.org/u/Jellby)\
**Replies:** 10\
**Last updated:** [September 15, 2025, 3:45pm UTC](https://discourse.vtk.org/t/relative-depth-between-surfaces-and-lines/16023 "2025-09-15T15:45:48Z")

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I’m representing essentially the same data as lines and as tubes/spheres, as separate mappers and actors. I’m expecting the tubes to cover the lines (which mathematically would be inside the tubes) where they coincide. B…

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## [TRAME dynamic thumbnail](https://discourse.vtk.org/t/trame-dynamic-thumbnail/16021)

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**Author:** [@firinini](https://discourse.vtk.org/u/firinini)\
**Replies:** 3\
**Last updated:** [September 15, 2025, 12:56pm UTC](https://discourse.vtk.org/t/trame-dynamic-thumbnail/16021 "2025-09-15T12:56:57Z")

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Hi, I’d like to embed a dynamic thumbnail of an iframe (used to display different Trame apps) within my larger application frontend. The idea is that whenever my iFrame rerenders, or whenever callbacks are triggered with…

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## [How to check if MathText is supported without importing all of vtk?](https://discourse.vtk.org/t/how-to-check-if-mathtext-is-supported-without-importing-all-of-vtk/16038)

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**Author:** [@user27182](https://discourse.vtk.org/u/user27182)\
**Replies:** 2\
**Last updated:** [September 12, 2025, 7:46pm UTC](https://discourse.vtk.org/t/how-to-check-if-mathtext-is-supported-without-importing-all-of-vtk/16038 "2025-09-12T19:46:32Z")

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If I do: import vtkmodules.vtkRenderingFreeType vtkmodules.vtkRenderingFreeType.vtkMathTextFreeTypeTextRenderer().MathTextIsSupported() It returns False But if I do instead: import vtk vtk.vtkMathTextFreeTypeTextRend…

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## [Thicker layers cause 'fluctuations'.](https://discourse.vtk.org/t/thicker-layers-cause-fluctuations/16036)

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**Author:** [@WangTurbo](https://discourse.vtk.org/u/WangTurbo)\
**Replies:** 0\
**Last updated:** [September 12, 2025, 11:33am UTC](https://discourse.vtk.org/t/thicker-layers-cause-fluctuations/16036 "2025-09-12T11:33:16Z")

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In the example of using vtk’s FourPaneViewer, when importing thick layers, such as 5mm head CT dicom data, dragging the crosshair causes fluctuations in the surface reconstruction results. This should be due to vtk recal…

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## [Axes and camera widgets in a Qt render window](https://discourse.vtk.org/t/axes-and-camera-widgets-in-a-qt-render-window/16034)

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**Author:** [@Jellby](https://discourse.vtk.org/u/Jellby)\
**Replies:** 0\
**Last updated:** [September 12, 2025, 9:22am UTC](https://discourse.vtk.org/t/axes-and-camera-widgets-in-a-qt-render-window/16034 "2025-09-12T09:22:12Z")

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Using vtkCameraOrientationWidget or vtkOrientationMarkerWidget works fine on a “barebones” Python script: #!/usr/bin/env python3 import vtk renderer = vtk.vtkRenderer() render\_window = vtk.vtkRenderWindow() render\_win…

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## [Write UnstructuredGrid in parallel](https://discourse.vtk.org/t/write-unstructuredgrid-in-parallel/16025)

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**Author:** [@akaszynski](https://discourse.vtk.org/u/akaszynski)\
**Replies:** 6\
**Last updated:** [September 12, 2025, 8:52am UTC](https://discourse.vtk.org/t/write-unstructuredgrid-in-parallel/16025 "2025-09-12T08:52:48Z")

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Hello, I’m attempting write out an UnstructuredGrid using vtkXMLPUnstructuredGridWriter, but I’m hitting a wall. Specifically, I can’t seem to actually write out the file in N pieces and instead it writes out the entire…

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## [accessing interpolated values of a slice from volumetric data](https://discourse.vtk.org/t/accessing-interpolated-values-of-a-slice-from-volumetric-data/16031)

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**Author:** [@Gafa](https://discourse.vtk.org/u/Gafa)\
**Replies:** 1\
**Last updated:** [September 11, 2025, 11:01pm UTC](https://discourse.vtk.org/t/accessing-interpolated-values-of-a-slice-from-volumetric-data/16031 "2025-09-11T23:01:44Z")

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I’m using pyVista to cut a slice from an unstructured grid. I believe the slice function in pyVista is using vtkCutter to create the slice. When I plot it, it shows an nice image floating in a 3d viewer. However I cant s…

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## [Scatter Plot Markers Not Rending in QQuickVTKItem in Qt QML Application](https://discourse.vtk.org/t/scatter-plot-markers-not-rending-in-qquickvtkitem-in-qt-qml-application/16018)

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**Author:** [@Parker\_Hranicky](https://discourse.vtk.org/u/Parker_Hranicky)\
**Replies:** 1\
**Last updated:** [September 11, 2025, 9:51pm UTC](https://discourse.vtk.org/t/scatter-plot-markers-not-rending-in-qquickvtkitem-in-qt-qml-application/16018 "2025-09-11T21:51:34Z")

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Hello! I’ve been using QQuickVTKItem in our Qt QML application for line plots for a while now and its worked just fine. Though when I try to use markers to overlay them onto a line plot, or to create a scatter plot, the…

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## [Rigid registration for volumetric meshes](https://discourse.vtk.org/t/rigid-registration-for-volumetric-meshes/16027)

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**Author:** [@nicocap](https://discourse.vtk.org/u/nicocap)\
**Replies:** 0\
**Last updated:** [September 10, 2025, 3:03pm UTC](https://discourse.vtk.org/t/rigid-registration-for-volumetric-meshes/16027 "2025-09-10T15:03:14Z")

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Hello, In my recent project, I’m working with volumetric meshes of scapulae. I have already rigidly aligned them, as you can see in the picture, but I now aim to align a template non-rigidly to each of my scapulae. As I…

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## [Applying texture that is embedded within a glb model](https://discourse.vtk.org/t/applying-texture-that-is-embedded-within-a-glb-model/16022)

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**Author:** [@MalekDeKalem](https://discourse.vtk.org/u/MalekDeKalem)\
**Replies:** 0\
**Last updated:** [September 9, 2025, 12:45pm UTC](https://discourse.vtk.org/t/applying-texture-that-is-embedded-within-a-glb-model/16022 "2025-09-09T12:45:27Z")

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Hello everyone, I am having a considerable amount of trouble getting vtk to render my 3d model with its textures.I am using the python module for vtk with trame.My version of vtk is 9.5.1 from trame.app import get\_serv…

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## [Python: using less RAM for rendering](https://discourse.vtk.org/t/python-using-less-ram-for-rendering/16010)

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**Author:** [@sapvi](https://discourse.vtk.org/u/sapvi)\
**Replies:** 1\
**Last updated:** [September 8, 2025, 6:25pm UTC](https://discourse.vtk.org/t/python-using-less-ram-for-rendering/16010 "2025-09-08T18:25:07Z")

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Hi all. I am using VTK Python in my application for point cloud visualization. I would like to be able to support rather big point clouds but, as I have noticed in my app, the high RAM usage does not make it possible. O…

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## [X11:X11 target not found when uprgrading from vtk 8 to 9 on Rocky9 linux](https://discourse.vtk.org/t/x11-x11-target-not-found-when-uprgrading-from-vtk-8-to-9-on-rocky9-linux/15295)

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**Author:** [@x7w53](https://discourse.vtk.org/u/x7w53)\
**Replies:** 13\
**Last updated:** [September 8, 2025, 12:07am UTC](https://discourse.vtk.org/t/x11-x11-target-not-found-when-uprgrading-from-vtk-8-to-9-on-rocky9-linux/15295 "2025-09-08T00:07:38Z")

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Our top level cmake command succeeded on Rocky9 linux when using a manual build of vtk 8.2. But now when trying to switch to the native version of vtk 9.1.0 as installed on Rocky9 linux from the epel repo, anything in c…

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## [wglMakeCurrent error with multiple vtk windows](https://discourse.vtk.org/t/wglmakecurrent-error-with-multiple-vtk-windows/16006)

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**Author:** [@twilson](https://discourse.vtk.org/u/twilson)\
**Replies:** 4\
**Last updated:** [September 6, 2025, 11:28am UTC](https://discourse.vtk.org/t/wglmakecurrent-error-with-multiple-vtk-windows/16006 "2025-09-06T11:28:18Z")

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We have a java application in which we are trying to utilize vtk. I have created a fairly simply MPR vtk pipeline using vtkImageResliceMapper and everything seems to work fine when I have just a single window using this …

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## [Installation of VTK on macOS silicon system using GCC instead of GLANG](https://discourse.vtk.org/t/installation-of-vtk-on-macos-silicon-system-using-gcc-instead-of-glang/16011)

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**Author:** [@Alejandro](https://discourse.vtk.org/u/Alejandro)\
**Replies:** 1\
**Last updated:** [September 5, 2025, 1:24pm UTC](https://discourse.vtk.org/t/installation-of-vtk-on-macos-silicon-system-using-gcc-instead-of-glang/16011 "2025-09-05T13:24:25Z")

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Hello, I hope you are doing well. I am new to VTK, and I am trying to install VTK using gcc on macOS Silicon system instead of using CLANG. I have been following the instructions here https://gitlab.kitware.com/vtk/vtk…

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## [Building VTK git 5a0129e461 with MingW64 9.5.0 GCC](https://discourse.vtk.org/t/building-vtk-git-5a0129e461-with-mingw64-9-5-0-gcc/15127)

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**Author:** [@biggestsonicfan](https://discourse.vtk.org/u/biggestsonicfan)\
**Replies:** 3\
**Last updated:** [September 5, 2025, 9:36am UTC](https://discourse.vtk.org/t/building-vtk-git-5a0129e461-with-mingw64-9-5-0-gcc/15127 "2025-09-05T09:36:56Z")

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Greetings all. I have read in quite a few places that VTK has troubles under MingW and MSYS and have attempted as many workarounds as I can (eg CMAKE\_CXX\_FLAGS of -Wa,-mbig-obj for File too big errors and -O1 optimizati…

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## [AnnotatedCubeActor](https://discourse.vtk.org/t/annotatedcubeactor/12337)

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**Author:** [@hamid\_badi](https://discourse.vtk.org/u/hamid_badi)\
**Replies:** 4\
**Last updated:** [September 4, 2025, 7:37pm UTC](https://discourse.vtk.org/t/annotatedcubeactor/12337 "2025-09-04T19:37:11Z")

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Hi, The default vtk AnnotatedCubeActor is very limited in term of interaction. Is there anybody who developed an advanced AnnotatedCubeActor such as in freecad ? Thanks.

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## [Remote Module](https://discourse.vtk.org/t/remote-module/13024)

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**Author:** [@DominionSoftware](https://discourse.vtk.org/u/DominionSoftware)\
**Replies:** 10\
**Last updated:** [September 4, 2025, 2:44pm UTC](https://discourse.vtk.org/t/remote-module/13024 "2025-09-04T14:44:12Z")

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(https://examples.vtk.org/site/Cxx/Points/PoissonExtractSurface/) I’m trying to build VTK 9.3.0 with the remote module via these instructions: To use PoissonReconstruction in VTK: Download PoissonReconstruction.remot…

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## [Rendering a lattice graph](https://discourse.vtk.org/t/rendering-a-lattice-graph/16009)

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**Author:** [@Jellby](https://discourse.vtk.org/u/Jellby)\
**Replies:** 2\
**Last updated:** [September 4, 2025, 12:49pm UTC](https://discourse.vtk.org/t/rendering-a-lattice-graph/16009 "2025-09-04T12:49:13Z")

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I would like to display a 3D lattice DAG, where every vertex has associated integer (x,y,z) coordinates, and the edges are the edges of the corresponding cubic lattice. I can build the graph with vtkMutableDirectedGraph …

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## [Does vtkMultiVolume always render more discretely compared to vtkVolume?](https://discourse.vtk.org/t/does-vtkmultivolume-always-render-more-discretely-compared-to-vtkvolume/16013)

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**Author:** [@MeRB](https://discourse.vtk.org/u/MeRB)\
**Replies:** 0\
**Last updated:** [September 3, 2025, 4:57pm UTC](https://discourse.vtk.org/t/does-vtkmultivolume-always-render-more-discretely-compared-to-vtkvolume/16013 "2025-09-03T16:57:13Z")

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Hi, vtk experts. My application can render different volumetric datasets. Currently, I am working with dental CT volume data. First image: Rendered with a single volume renderer, without applying any masking. I used …

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## [VTK.JS (Painting and erasing tool radius size)](https://discourse.vtk.org/t/vtk-js-painting-and-erasing-tool-radius-size/16007)

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**Author:** [@selimcanozgur](https://discourse.vtk.org/u/selimcanozgur)\
**Replies:** 1\
**Last updated:** [September 1, 2025, 10:28am UTC](https://discourse.vtk.org/t/vtk-js-painting-and-erasing-tool-radius-size/16007 "2025-09-01T10:28:00Z")

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I have painting and erasing tools, and their radius sizes appear differently on the coronal screen and on the sagittal screen and on the axial screen. Is there a way to show them at the same size on all screens? And is t…

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## [vtkMultivolume : Issue with setUserTransform() for a specific vtkVolume](https://discourse.vtk.org/t/vtkmultivolume-issue-with-setusertransform-for-a-specific-vtkvolume/15696)

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**Author:** [@Limz90](https://discourse.vtk.org/u/Limz90)\
**Replies:** 7\
**Last updated:** [August 29, 2025, 2:11pm UTC](https://discourse.vtk.org/t/vtkmultivolume-issue-with-setusertransform-for-a-specific-vtkvolume/15696 "2025-08-29T14:11:37Z")

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Hello Guys, I am using vtkMultiVolume to render 2 different vtkImageData objects but setting a vktTransform for a specific vtkvolume has no affect. Is it possible to apply transformations separately on the vtkVolumes ad…

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## [vtkGPUVolumeRayCastMapper -\> SetMaskInput : vtkVolumePicker picks masked cells](https://discourse.vtk.org/t/vtkgpuvolumeraycastmapper-setmaskinput-vtkvolumepicker-picks-masked-cells/1682)

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**Author:** [@renaud-lebrun](https://discourse.vtk.org/u/renaud-lebrun)\
**Replies:** 11\
**Last updated:** [August 29, 2025, 11:33am UTC](https://discourse.vtk.org/t/vtkgpuvolumeraycastmapper-setmaskinput-vtkvolumepicker-picks-masked-cells/1682 "2025-08-29T11:33:23Z")

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Dear VTK users, I am rendering volume data with vtkGPUVolumeRayCastMapper (and with vtkOpenGLGPUVolumeRayCastMapper) I hide several parts by using the function SetMaskInput available with these 2 mappers. When I use v…

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## [using vtk on xilinx fpga mpsoc(ultrascale)](https://discourse.vtk.org/t/using-vtk-on-xilinx-fpga-mpsoc-ultrascale/6904)

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**Author:** [@payam\_aminian](https://discourse.vtk.org/u/payam_aminian)\
**Replies:** 1\
**Last updated:** [August 26, 2025, 10:25am UTC](https://discourse.vtk.org/t/using-vtk-on-xilinx-fpga-mpsoc-ultrascale/6904 "2025-08-26T10:25:30Z")

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hi dear professionals i need to cross compile VTK with Qt support for arm base zynq ultra-scale fpga’s with mali-400 GPU , how can i have this done?

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## [Unable to change the color of the selection box in vtkChart](https://discourse.vtk.org/t/unable-to-change-the-color-of-the-selection-box-in-vtkchart/15990)

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**Author:** [@roy](https://discourse.vtk.org/u/roy)\
**Replies:** 0\
**Last updated:** [August 22, 2025, 11:58am UTC](https://discourse.vtk.org/t/unable-to-change-the-color-of-the-selection-box-in-vtkchart/15990 "2025-08-22T11:58:02Z")

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Hello, Is there any way to change the color of the selection box/polygon which is used to select points on the plot for vtkChart from black to something else? I am using VTK version 9.5

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## [Update camera in trame vtkLocalView](https://discourse.vtk.org/t/update-camera-in-trame-vtklocalview/15979)

<div class="topic-metadata">

**Author:** [@firinini](https://discourse.vtk.org/u/firinini)\
**Replies:** 6\
**Last updated:** [August 21, 2025, 8:00pm UTC](https://discourse.vtk.org/t/update-camera-in-trame-vtklocalview/15979 "2025-08-21T20:00:29Z")

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Hi, I have been trying back and forward but cannot figure out why this camera update in VtkLocalView does not work. Any input would be appreciated, thanks! from trame.app import get\_server from trame.ui.vuetify3 impo…

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## [python import vtk hangs indefinitely](https://discourse.vtk.org/t/python-import-vtk-hangs-indefinitely/15983)

<div class="topic-metadata">

**Author:** [@JBarr](https://discourse.vtk.org/u/JBarr)\
**Replies:** 3\
**Last updated:** [August 20, 2025, 5:37pm UTC](https://discourse.vtk.org/t/python-import-vtk-hangs-indefinitely/15983 "2025-08-20T17:37:45Z")

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I am trying to install vtk for use in Blender, which currently uses Python 3.11.11, via pip install vtk the line “import vtk” causes python to freeze indefinitely, without ever throwing an error message. If I attempt t…

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## [How can I solve the problem of jom/nmake.exe exiting during this compilation process?](https://discourse.vtk.org/t/how-can-i-solve-the-problem-of-jom-nmake-exe-exiting-during-this-compilation-process/15977)

<div class="topic-metadata">

**Author:** [@Drink\_theRain](https://discourse.vtk.org/u/Drink_theRain)\
**Replies:** 2\
**Last updated:** [August 20, 2025, 12:27pm UTC](https://discourse.vtk.org/t/how-can-i-solve-the-problem-of-jom-nmake-exe-exiting-during-this-compilation-process/15977 "2025-08-20T12:27:49Z")

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My environment information is VS2022 + VTK9.4.0 + qt 6.8.0 on WIN11. At present, there will be an error as shown in the following figure in the compilation process. Whether or not “Use jom instead of nmake” is checked, I…

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## [VTKImagePlaneWidget has a slight issue with depth peeling](https://discourse.vtk.org/t/vtkimageplanewidget-has-a-slight-issue-with-depth-peeling/15981)

<div class="topic-metadata">

**Author:** [@fraseyboo](https://discourse.vtk.org/u/fraseyboo)\
**Replies:** 0\
**Last updated:** [August 19, 2025, 2:39pm UTC](https://discourse.vtk.org/t/vtkimageplanewidget-has-a-slight-issue-with-depth-peeling/15981 "2025-08-19T14:39:24Z")

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Hey guys, I’ve been doing a little work with the VTKImagePlaneWidget, I added plane intersections pretty easily with a triangle and intersection filter which helps show the intersections of the plane. I’ve noticed that …

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