# accessing interpolated values of a slice from volumetric data

**URL:** https://discourse.vtk.org/t/accessing-interpolated-values-of-a-slice-from-volumetric-data/16031
**Category:** Support
**Tags:** python
**Created:** [September 11, 2025, 12:06pm UTC](https://discourse.vtk.org/t/accessing-interpolated-values-of-a-slice-from-volumetric-data/16031 "2025-09-11T12:06:15Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Gafa](https://discourse.vtk.org/user_avatar/discourse.vtk.org/gafa/32/10275_2.png) [@Gafa](https://discourse.vtk.org/u/Gafa)
#### Post date: [September 11, 2025, 12:06pm UTC](https://discourse.vtk.org/t/accessing-interpolated-values-of-a-slice-from-volumetric-data/16031/1 "2025-09-11T12:06:15Z")

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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 seem so access this data directly.

I can access the vertices on the sliced plane and their values. But I cant see how this is interpolated to produce the nice result that I’m seeing in the 3d Viewer.

Is there a way to access or replicate the interpolated image from the slice?

Thanks in advance!

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### Author: ![cory.quammen](https://discourse.vtk.org/user_avatar/discourse.vtk.org/cory.quammen/32/6751_2.png) [@cory.quammen](https://discourse.vtk.org/u/cory.quammen)
#### Post date: [September 11, 2025, 11:01pm UTC](https://discourse.vtk.org/t/accessing-interpolated-values-of-a-slice-from-volumetric-data/16031/2 "2025-09-11T23:01:44Z")

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Someone here might know about how to do this in PyVista (I don’t), but since that is a separate project build on top of VTK, you might ask in it’s discussion forum at [pyvista/pyvista · Discussions · GitHub](https://github.com/pyvista/pyvista/discussions)