# vtkDecimatePro using vtkDataSet

**URL:** https://discourse.vtk.org/t/vtkdecimatepro-using-vtkdataset/5956
**Category:** Support
**Created:** [June 8, 2021, 1:26am UTC](https://discourse.vtk.org/t/vtkdecimatepro-using-vtkdataset/5956 "2021-06-08T01:26:24Z")
**Posts on this page:** 1
**Showing post:** 5

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### Author: ![Hyunwoo\_Kim](https://discourse.vtk.org/user_avatar/discourse.vtk.org/hyunwoo_kim/32/3465_2.png) [@Hyunwoo\_Kim](https://discourse.vtk.org/u/Hyunwoo_Kim)
#### Post date: [June 9, 2021, 4:32am UTC](https://discourse.vtk.org/t/vtkdecimatepro-using-vtkdataset/5956/5 "2021-06-09T04:32:28Z")

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I was converting VTK version from 5.0.3 to 9.0.1.  
Therefore, I’d to change some custom vtk clas using vtkPolyDataAlgorithm.  
In that process, I changed the pipeline.  
I’m finding why converted source don’t render actors correctly, so I tried to change some code between pipeline and just data.

1: [about RequestData - #7 by Hyunwoo\_Kim](https://discourse.vtk.org/t/about-requestdata/5925/7)  
2: [vtkImageData rendering issue](https://discourse.vtk.org/t/vtkimagedata-rendering-issue/5966)

here is my issues, and If you have any solution, It would be so appreciated…

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