# Error of new releases of 3D slicer

**URL:** <https://discourse.slicer.org/t/error-of-new-releases-of-3d-slicer/33587>\
**Category:** Support\
**Created:** [January 2, 2024, 12:13pm UTC](https://discourse.slicer.org/t/error-of-new-releases-of-3d-slicer/33587 "2024-01-02T12:13:42Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![jamesobutler](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jamesobutler/32/7511_2.png) [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Post date:** [January 3, 2024, 1:18pm UTC](https://discourse.slicer.org/t/error-of-new-releases-of-3d-slicer/33587/4 "2024-01-03T13:18:53Z")

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> [@Arakeep90](#):
>
> When I segment the bone in the first segment then I add segment 2 to have another segmentation for the same bone, segment 1 shows nothing.

I would suggest you check your masking options as it sounds like your segment 2 is overwriting your segment 1. Please read [Segment editor — 3D Slicer documentation](https://slicer.readthedocs.io/en/latest/user_guide/modules/segmenteditor.html#masking-options).

> [@Arakeep90](#):
>
> , regarding volume rendering sometimes work but sometimes nothing.

Your steps leading up to when it is not working for you would be helpful along with any screenshots. What type of volume is it? I can only think that you may be running into a limitation of using multi-volume rendering with the maximum intensity projection option instead of composite shading. See related post below:

> [@Change 'order' of rendering of multiple volumes with Volume Rendering module](https://discourse.slicer.org/t/change-order-of-rendering-of-multiple-volumes-with-volume-rendering-module/32313/5):
>
> Thanks, yes I was using GPU Ray Casting. The VTK Multi-Volume option doesn’t work for me (nothing is displayed at all) with the “Maximum Intensity Projection” technique, which I usually need for nuc med images. It works great with the 'Composite with Shading" technique though.

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