# Black layers on z-axis

**URL:** <https://discourse.slicer.org/t/black-layers-on-z-axis/26264>\
**Category:** Support\
**Tags:** nrrd\
**Created:** [November 16, 2022, 7:16pm UTC](https://discourse.slicer.org/t/black-layers-on-z-axis/26264 "2022-11-16T19:16:37Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![hpok](https://avatars.discourse-cdn.com/v4/letter/h/cc9497/32.png) [@hpok](https://discourse.slicer.org/u/hpok)\
**Post date:** [November 16, 2022, 7:16pm UTC](https://discourse.slicer.org/t/black-layers-on-z-axis/26264/1 "2022-11-16T19:16:37Z")

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Hello everyone, I would like to ask about importing data into Slicer. I have a sequence of tiffs of cells. I have converted them to nrrd data to use within the Slicer. When I load them in, their almost correct measurements load by themselves

 ![image (3)](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/a/b/ab455073aaf1682e5aa25ff1acabf7540e578531.jpeg)  
 ![MicrosoftTeams-image (2)](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/2/6/26fcf07e47ddd471f7e299250f2de94d90c778ae.jpeg)  
(Volumes → More Information-\> Slice Spacing) at values 1.242 x 1.242 x 1.242. The Slices, however, have a black layering on the z-axis (see photo 1). I change the layer spacing to be correct: 1.242 x 1.242 x 6, at which point the z axis elongates but the black layers stay (picture 2). How can I make the slices sit closer together so there are no black division line spaces between the slices with the data? I have another dataset with a larger single cell where this ‘layering’ isn’t an issue (also tiffs converted to nrrd dataset). Thank you in advance.

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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:** [December 1, 2022, 7:14am UTC](https://discourse.slicer.org/t/black-layers-on-z-axis/26264/2 "2022-12-01T07:14:22Z")

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It seems that the conversion to NRRD file had some errors. You can load the TIFF stack directly, using ImageStacks module of SlicerMorph extension.

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**Author:** ![hpok](https://avatars.discourse-cdn.com/v4/letter/h/cc9497/32.png) [@hpok](https://discourse.slicer.org/u/hpok)\
**Post date:** [December 4, 2022, 11:31am UTC](https://discourse.slicer.org/t/black-layers-on-z-axis/26264/3 "2022-12-04T11:31:51Z")

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Hi Andras, thank you so much for your response.  
I have tried the Slicer Morph and when I adjust the slice thickness, it becomes all distorted…

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/9/f/9fbc10a1dbbc724c2f45d9624ae4b5b629f6c7c8.png)