# Gradient artifact with Mask Volume effect from Editor Extra Effects?

**URL:** <https://discourse.slicer.org/t/gradient-artifact-with-mask-volume-effect-from-editor-extra-effects/4916>\
**Category:** Support\
**Created:** [November 30, 2018, 12:26am UTC](https://discourse.slicer.org/t/gradient-artifact-with-mask-volume-effect-from-editor-extra-effects/4916 "2018-11-30T00:26:11Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [December 5, 2018, 4:35pm UTC](https://discourse.slicer.org/t/gradient-artifact-with-mask-volume-effect-from-editor-extra-effects/4916/6 "2018-12-05T16:35:03Z")

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My understanding is that it is onle for viewing in slice viewers:

> [@What is the underlying function of 'interpolate' option of Volumes module](https://discourse.slicer.org/t/what-is-the-underlying-function-of-interpolate-option-of-volumes-module/1604/2):
>
> That option controls how the image is sampled when scaled for display: nearest neighbor / linear (see [https://en.wikipedia.org/wiki/Image\_scaling](https://en.wikipedia.org/wiki/Image_scaling) for details). There is nothing to save - what you see is still the original volume.

> [@Slice Interpolation](https://discourse.slicer.org/t/slice-interpolation/2808/5):
>
> You always see the real image. The coordinates (both the anatomical/patient coordinates and voxel coordinates) are also all real and correct. You may turn off interpolation (Volumes module / Display / Interpolate checkbox) if you want to make sure that at a certain position in the image you see the contribution of exactly one pixel of the image slices. If you could tell what your application (anatomy, procedure, imaging modality, etc) and your concerns are then we could give more specific answ…

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