# Paraview does not render a vtkImageData object generated by a vtkpythonalgorithmbase plugin

**URL:** https://discourse.paraview.org/t/paraview-does-not-render-a-vtkimagedata-object-generated-by-a-vtkpythonalgorithmbase-plugin/1044
**Category:** ParaView Support
**Tags:** python
**Created:** [December 14, 2018, 5:48pm UTC](https://discourse.paraview.org/t/paraview-does-not-render-a-vtkimagedata-object-generated-by-a-vtkpythonalgorithmbase-plugin/1044 "2018-12-14T17:48:52Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Jlamaro7](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/j/8e7dd6/32.png) [@Jlamaro7](https://discourse.paraview.org/u/Jlamaro7)
#### Post date: [December 14, 2018, 5:48pm UTC](https://discourse.paraview.org/t/paraview-does-not-render-a-vtkimagedata-object-generated-by-a-vtkpythonalgorithmbase-plugin/1044/1 "2018-12-14T17:48:52Z")

</div>

Hi!! I am a newbie who is trying to implement a plugin using vtkPythonAlgorithmBase.  
I was able to implement a point volume interpolator using vtkPointInterpolator (I am trying to do it without using the paraview.simple module). Then, I return to the RequestData a vtkImageData using pointVolumeInterpolator.GetOutput().

 ![RequestData](https://discourse.paraview.org/uploads/default/original/1X/c87c5ef02e22fdaa39c5ec82381331a492a6fd35.png)

And, when I use this new filter in ParaView, I obtained a vtkImageData with the same information as if i use the point volume interpolation filter, but **I cannot see anything in the render view** , and I do not know why.

I also upload the methods I implemented in order to generate this vtkImageData.

OUTPUT FUNCTION

![OutputFunction](https://discourse.paraview.org/uploads/default/original/1X/7949c61c392b5f2fd9b42d5f4d54758c796d1832.png)

POINT VOLUME INTERPOLATOR

 ![volumeInterpolator](https://discourse.paraview.org/uploads/default/original/1X/ee7d768e0a6cd676b79d883ce0c680b36200dd0b.png)

VALUES

![initial_variables](https://discourse.paraview.org/uploads/default/original/1X/fce4396db1afe0e762ad30475bc14b3c4fc8141d.png)

OTHER

 ![generateVoxelClip](https://discourse.paraview.org/uploads/default/original/1X/acdd107f4ad7c48b5424770b57ab53863f95d3a4.png)

Any help to understand why is this happening will be appreciated!!!  
Thanks 😀

PS: If it helps, I am using ParaView 5.6.0