# Setting segment opacity to \< 1.0 hides segments

**URL:** <https://discourse.slicer.org/t/setting-segment-opacity-to-1-0-hides-segments/46800>\
**Category:** Support\
**Created:** [April 21, 2026, 5:23pm UTC](https://discourse.slicer.org/t/setting-segment-opacity-to-1-0-hides-segments/46800 "2026-04-21T17:23:31Z")\
**Posts on this page:** 1\
**Showing post:** 11

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**Author:** ![Karuruychi](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/karuruychi/32/81758_2.png) [@Karuruychi](https://discourse.slicer.org/u/Karuruychi)\
**Post date:** [August 7, 2026, 7:20am UTC](https://discourse.slicer.org/t/setting-segment-opacity-to-1-0-hides-segments/46800/11 "2026-08-07T07:20:44Z")

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@chir.set Hi, after looking into your issue, I noticed an interesting similarity with a problem I’m experiencing on Linux.

When I set the segmentation opacity to anything below 1.0, the rendering also becomes incorrect. In your case, the segmentation disappears completely, while in my case it becomes fragmented/corrupted.

The symptoms are different, but both problems seem to start when the opacity goes below 1.0. Could you take a look and see if you can guess what might be happening in both cases, and whether they could be related somehow?  
Link to my issue: [Color display error on 3D Volume](https://discourse.slicer.org/t/color-display-error-on-3d-volume/46390)

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