# segment visibility in 2D and 3D

**URL:** <https://discourse.slicer.org/t/segment-visibility-in-2d-and-3d/43707>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [July 13, 2025, 10:28pm UTC](https://discourse.slicer.org/t/segment-visibility-in-2d-and-3d/43707 "2025-07-13T22:28:19Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![apeneck](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/apeneck/32/80627_2.png) [@apeneck](https://discourse.slicer.org/u/apeneck)\
**Post date:** [July 13, 2025, 10:28pm UTC](https://discourse.slicer.org/t/segment-visibility-in-2d-and-3d/43707/1 "2025-07-13T22:28:19Z")

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In segment editor, if I click the eye icon next to a segment, it turns it off in the 2D views, but not in the 3D view. I’ve been away from the program for a few weeks, but when I last used it, clicking the eye icon made a segment visible (or invisible) in both 2D and 3D views. I’ve clicked the “Show 3D” button several times, with no change.

I think I’ve forgotten some very basic knowledge that I had just a few weeks ago. Either that or the program’s suddenly gotten squirrely. Help?

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [July 13, 2025, 10:32pm UTC](https://discourse.slicer.org/t/segment-visibility-in-2d-and-3d/43707/2 "2025-07-13T22:32:09Z")

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Probably you have an extra copy of the segmentation visible, perhaps as a model node?

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<div class="post-metadata">

**Author:** ![apeneck](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/apeneck/32/80627_2.png) [@apeneck](https://discourse.slicer.org/u/apeneck)\
**Post date:** [July 15, 2025, 5:00pm UTC](https://discourse.slicer.org/t/segment-visibility-in-2d-and-3d/43707/3 "2025-07-15T17:00:51Z")

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Steve - You were correct. Thanks for the help.

I believe this occurred after I converted segments to STL files. Does it make sense that might cause the issue?

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<div class="post-metadata">

**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [July 15, 2025, 5:05pm UTC](https://discourse.slicer.org/t/segment-visibility-in-2d-and-3d/43707/4 "2025-07-15T17:05:26Z")

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Yes, it makes sense that if you exported to STL the segmentation needed to be converted to a model which is displayed in 3D by default.