# Bug? Segmentation opacity not updated in panel

**URL:** <https://discourse.slicer.org/t/bug-segmentation-opacity-not-updated-in-panel/22771>\
**Category:** Support\
**Created:** [March 31, 2022, 3:50am UTC](https://discourse.slicer.org/t/bug-segmentation-opacity-not-updated-in-panel/22771 "2022-03-31T03:50:31Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![DIV](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/div/32/12816_2.png) [@DIV](https://discourse.slicer.org/u/DIV)\
**Post date:** [March 31, 2022, 3:50am UTC](https://discourse.slicer.org/t/bug-segmentation-opacity-not-updated-in-panel/22771/1 "2022-03-31T03:50:31Z")

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I opened several `Segmentation`s (by loading previously saved STL files.

In the **Segmentations** module, with one `Segmentation` active I set the `Overall opacity` from 1.00 to 0.50. Its rendering in the 3D window was correspondingly adjusted, but the other `Segmentation`s appeared visually unchanged.

![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/c/d/cdaaf4273e95e515d7a291e12f7c3fd5e35a1f9e.png)

When I then choose a different `Segmentation` as active, its `Overall opacity` is erroneously still shown as 0.50, even though what’s actually rendered is the original default of 1.00. This is obvious if a further adjustment is made in the _Display_ panel to increase the `Overall opacity` to 0.60, resulting in an obvious decrease in opacity in the 3D view (_i.e._ from 1.00 down to 0.60).

Version 4.13.0-2022-01-19

—DIV

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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:** [March 31, 2022, 9:13am UTC](https://discourse.slicer.org/t/bug-segmentation-opacity-not-updated-in-panel/22771/2 "2022-03-31T09:13:26Z")

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Good catch. I fixed this in [BUG: Fix update of overall opacity slider in Segmentations module by cpinter · Pull Request #6289 · Slicer/Slicer · GitHub](https://github.com/Slicer/Slicer/pull/6289)

Once approved and integrated it will be fixed in the next preview release.