# Thresholding creates squares

**URL:** <https://discourse.slicer.org/t/thresholding-creates-squares/43076>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [May 24, 2025, 2:21pm UTC](https://discourse.slicer.org/t/thresholding-creates-squares/43076 "2025-05-24T14:21:39Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![vivaciousviscera](https://avatars.discourse-cdn.com/v4/letter/v/34f0e0/32.png) [@vivaciousviscera](https://discourse.slicer.org/u/vivaciousviscera)\
**Post date:** [May 24, 2025, 2:21pm UTC](https://discourse.slicer.org/t/thresholding-creates-squares/43076/1 "2025-05-24T14:21:40Z")

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When I press “Apply” after setting the threshold values for my segment, it creates squares instead of smooth painted areas over my structures. Any idea on what’s going on here and how to fix this?

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [May 24, 2025, 2:26pm UTC](https://discourse.slicer.org/t/thresholding-creates-squares/43076/2 "2025-05-24T14:26:56Z")

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By default, the segmentation rsaolutipn matches the resolution of the source image. If the resolition is low then you the appearance in slice views will be blocky. You can resample the source volume or segmentation as described [here](https://slicer.readthedocs.io/en/latest/user_guide/modules/segmenteditor.html#segmentation-is-not-accurate-enough).