# Change interpolation method

**URL:** <https://discourse.slicer.org/t/change-interpolation-method/19318>\
**Category:** Development\
**Created:** [August 23, 2021, 2:53pm UTC](https://discourse.slicer.org/t/change-interpolation-method/19318 "2021-08-23T14:53:38Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![jamesobutler](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jamesobutler/32/7511_2.png) [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Post date:** [August 23, 2021, 3:29pm UTC](https://discourse.slicer.org/t/change-interpolation-method/19318/2 "2021-08-23T15:29:45Z")

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It appears you are trying to use PhongInterpolation for more realistic shading?

> <https://github.com/Slicer/Slicer/blob/0094e9a35bd266cc8b0e677858dabce797c9928f/Libs/MRML/Core/vtkMRMLDisplayNode.h#L54-L57>

Have you tried the “Lights” module for various interactive lighting techniques for shading?

> [@New module to customize lighting in 3D view](https://discourse.slicer.org/t/new-module-to-customize-lighting-in-3d-view/8804):
>
> A new experimental module, “Lights”, was added to “Sandbox” extension that allows you to change lightkit parameters with a simple GUI. See a short demo video here: If we get the feedback that this module is useful then we’ll consider adding it to the Slicer core.

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