# Create filter that uses vtkImageAppend

**URL:** https://discourse.paraview.org/t/create-filter-that-uses-vtkimageappend/11857
**Category:** ParaView Support
**Tags:** vtk
**Created:** [April 12, 2023, 8:45am UTC](https://discourse.paraview.org/t/create-filter-that-uses-vtkimageappend/11857 "2023-04-12T08:45:59Z")
**Posts on this page:** 1
**Showing post:** 8

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### Author: ![eve-le-guillou](https://discourse.paraview.org/user_avatar/discourse.paraview.org/eve-le-guillou/32/11047_2.png) [@eve-le-guillou](https://discourse.paraview.org/u/eve-le-guillou)
#### Post date: [April 28, 2023, 9:38am UTC](https://discourse.paraview.org/t/create-filter-that-uses-vtkimageappend/11857/8 "2023-04-28T09:38:42Z")

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Thank you for the reply.

I eventually created my own function for merging vtkImageData objects that corresponded to my needs better.

The error message mentioned earlier was due to my implementation missing the `RequestUpdateExtent` function, similarly to what is described [here](https://discourse.paraview.org/t/adding-new-points-in-programmable-filter/9383/3).

Everything seems to work well now.

Thanks for all the help!

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