# Show 3D but not shading in red window

**URL:** <https://discourse.slicer.org/t/show-3d-but-not-shading-in-red-window/44835>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [October 21, 2025, 10:48am UTC](https://discourse.slicer.org/t/show-3d-but-not-shading-in-red-window/44835 "2025-10-21T10:48:43Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Hannnonk](https://avatars.discourse-cdn.com/v4/letter/h/b5a626/32.png) [@Hannnonk](https://discourse.slicer.org/u/Hannnonk)\
**Post date:** [October 21, 2025, 10:48am UTC](https://discourse.slicer.org/t/show-3d-but-not-shading-in-red-window/44835/1 "2025-10-21T10:48:43Z")

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Is there a way to keep the 3D view but turn off the shading in the Red window in the conventional view?

thanks

 ![2025-10-21_6-45-16](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/5/5/55870be904a2142c5060d8ab6f85086eb9b11db8.jpeg)

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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:** [October 21, 2025, 10:51am UTC](https://discourse.slicer.org/t/show-3d-but-not-shading-in-red-window/44835/2 "2025-10-21T10:51:20Z")

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If I understand correctly you want to show the whole model in 3D (not just the intersection), but with no shading. You can achieve that by modifying the lighting options

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/1/3/13cd24fd411339c1951ddfafa46f1576a3cb2b82.png)

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**Author:** ![Hannnonk](https://avatars.discourse-cdn.com/v4/letter/h/b5a626/32.png) [@Hannnonk](https://discourse.slicer.org/u/Hannnonk)\
**Post date:** [October 21, 2025, 11:29am UTC](https://discourse.slicer.org/t/show-3d-but-not-shading-in-red-window/44835/3 "2025-10-21T11:29:33Z")

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Maybe I should reword- I want to see the 3D view, but just a plain CT window.

thanks

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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:** [October 21, 2025, 11:59am UTC](https://discourse.slicer.org/t/show-3d-but-not-shading-in-red-window/44835/4 "2025-10-21T11:59:47Z")

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The slice intersection in 3D shows exactly the slice image from the 2D view. If you want to have a slice in 3D without the contour, you need to create such a view in 2D and show that in 3D.

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**Author:** ![mau\_igna\_06](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/mau_igna_06/32/9056_2.png) [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Post date:** [October 21, 2025, 12:30pm UTC](https://discourse.slicer.org/t/show-3d-but-not-shading-in-red-window/44835/5 "2025-10-21T12:30:56Z")

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Try using the options marked on the red square of the picture below:

 ![Screenshot from 2025-10-21 09-29-02_2](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/3/f/3fbc567a6181410e668a734de36742e65c4dad5c.jpeg)

HIH

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<div class="post-metadata">

**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:** [October 21, 2025, 12:33pm UTC](https://discourse.slicer.org/t/show-3d-but-not-shading-in-red-window/44835/6 "2025-10-21T12:33:09Z")

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I believe the goal is to keep the contour in 2D but not in 3D.

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**Author:** ![Hannnonk](https://avatars.discourse-cdn.com/v4/letter/h/b5a626/32.png) [@Hannnonk](https://discourse.slicer.org/u/Hannnonk)\
**Post date:** [October 21, 2025, 12:53pm UTC](https://discourse.slicer.org/t/show-3d-but-not-shading-in-red-window/44835/7 "2025-10-21T12:53:53Z")

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This does work thank you  
KH