# QVTKWidget Shows Transparent Plane

**URL:** https://discourse.vtk.org/t/qvtkwidget-shows-transparent-plane/8130
**Category:** Support
**Created:** [March 24, 2022, 4:19am UTC](https://discourse.vtk.org/t/qvtkwidget-shows-transparent-plane/8130 "2022-03-24T04:19:01Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Panda12197](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/p/e480ec/32.png) [@Panda12197](https://discourse.vtk.org/u/Panda12197)
#### Post date: [March 24, 2022, 4:19am UTC](https://discourse.vtk.org/t/qvtkwidget-shows-transparent-plane/8130/1 "2022-03-24T04:19:01Z")

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Hello Guys,

I try this [Example](https://github.com/PointCloudLibrary/pcl/tree/master/doc/tutorials/content/sources/qt_visualizer) to visualize the Point Cloud. But when I run the code, **QVTKWidget** becomes like this [image](https://i.stack.imgur.com/AYdag.png). QVTKWidget is transparent and can see background desktop screen at the place of widget. I also try other examples with **QVTKWidget** but get the same error like the above image. **Which version of VTK and Qt should be used to visualize the point cloud data?** And **Which type of Widget should be used?**  
I am using::

- Ubuntu 18.04
- Qt 5.9.5
- PCL 1.8
- Vtk 6.3

Please give me suggestions. I am just a beginner. Please answer my question. I really need your help.

Best regards.