# 3d image now showing

**URL:** https://discourse.slicer.org/t/3d-image-now-showing/27465
**Category:** Support
**Tags:** segmentation, extensions-manager, dicom, python
**Created:** [January 25, 2023, 5:46pm UTC](https://discourse.slicer.org/t/3d-image-now-showing/27465 "2023-01-25T17:46:44Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![Biomed321](https://avatars.discourse-cdn.com/v4/letter/b/e95f7d/32.png) [@Biomed321](https://discourse.slicer.org/u/Biomed321)
#### Post date: [January 25, 2023, 5:46pm UTC](https://discourse.slicer.org/t/3d-image-now-showing/27465/1 "2023-01-25T17:46:44Z")

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Operating system: 3dslicer  
Slicer version: 5.2.1 and 5.0.3  
Expected behavior: to produce a 3d image  
Actual behavior: not producing 3d image

So I have CT scans of hearts however I can only see the 2d pictures after growing seeds. When trying to initialise a 3d image should show up on 4th screen (top right) however it remains blank. I am using dcm files.

Do I need different extensions? And where do I find them?

Please help ☹

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/6/0/60128296e48c4f0b34c4348f4f64eba05c175b6d.jpeg)

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### Author: ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)
#### Post date: [January 25, 2023, 8:06pm UTC](https://discourse.slicer.org/t/3d-image-now-showing/27465/2 "2023-01-25T20:06:08Z")

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You (or one of the modules that you used) switched to the `Four-Up Plot` layout, which does not contain a 3D view (just slice views and a plot view).

You can switch to the `Four-Up` layout using the toolbar to get a view layout that shows 3 slice views and a 3D view.

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### Author: ![Matthew\_Pontell](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/matthew_pontell/32/80731_2.png) [@Matthew\_Pontell](https://discourse.slicer.org/u/Matthew_Pontell)
#### Post date: [July 29, 2025, 11:55pm UTC](https://discourse.slicer.org/t/3d-image-now-showing/27465/3 "2025-07-29T23:55:58Z")

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Hello, I am having trouble generating a 3d image from my DICOM file. When I upload the DICOM file I get the error “Image slices are not equally spaced” but then the axial and reformats will show in four up layout. I click the volume rendering module, open the eye and select the 3d center button but nothing shows up. I have tried the demo MRI and the 3d image will show. Any assistance would be much appreciated.

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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 30, 2025, 4:22pm UTC](https://discourse.slicer.org/t/3d-image-now-showing/27465/4 "2025-07-30T16:22:06Z")

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Yes, this is probably not obvious: when there are irregular spacings Slicer creates a nonlinear “acquisition transform” which isn’t handled by volume rendering. For now you need to [harden the transform](https://slicer.readthedocs.io/en/latest/user_guide/modules/transforms.html#harden-transform-on-a-node) for volume rendering.