# Question about DRR

**URL:** <https://discourse.slicer.org/t/question-about-drr/31286>\
**Category:** Support\
**Created:** [August 22, 2023, 2:25pm UTC](https://discourse.slicer.org/t/question-about-drr/31286 "2023-08-22T14:25:00Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![MYasinMohammadi](https://avatars.discourse-cdn.com/v4/letter/m/e9a140/32.png) [@MYasinMohammadi](https://discourse.slicer.org/u/MYasinMohammadi)\
**Post date:** [August 22, 2023, 2:25pm UTC](https://discourse.slicer.org/t/question-about-drr/31286/1 "2023-08-22T14:25:00Z")

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I have prepared a DRR image using Plastimatch

 ![DRR](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/5/5/555541e940b0aaec512cda224efd419316579c1a.png)

Gray rings can be seen in the display of this image. What is the cause of this phenomenon?

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**Author:** ![cpinter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cpinter/32/7995_2.png) [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Post date:** [August 24, 2023, 11:04am UTC](https://discourse.slicer.org/t/question-about-drr/31286/2 "2023-08-24T11:04:32Z")

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Images in the 2D views are interpolated by default. You can turn off interpolation in the view controller widget, accessed in the top left corner of the view, in the header.