# What's the different between show3D smooth and the segment's smooth?
**URL:** https://discourse.slicer.org/t/whats-the-different-between-show3d-smooth-and-the-segments-smooth/19750
**Category:** Development
**Created:** [September 19, 2021, 11:01pm UTC](https://discourse.slicer.org/t/whats-the-different-between-show3d-smooth-and-the-segments-smooth/19750 "2021-09-19T23:01:58Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)
#### Post date: [September 19, 2021, 11:01pm UTC](https://discourse.slicer.org/t/whats-the-different-between-show3d-smooth-and-the-segments-smooth/19750/1 "2021-09-19T23:01:58Z")
I created a segment and show a well smooth 3D model with smooth factor=0.7. However, when I try to use the segment smooth(median,joint smoothing or closing) and the smooth factor=0 of show3D, the model seems very rough. I also tried the surface tool smooth(under smooth factor=0 of show3D), and the result still was very rough.
So, what’s the vtk smoother or the pipeline of the show3D?
Thanks!
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### Author:  [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)
#### Post date: [September 19, 2021, 11:09pm UTC](https://discourse.slicer.org/t/whats-the-different-between-show3d-smooth-and-the-segments-smooth/19750/2 "2021-09-19T23:09:12Z")
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### Author:  [@lassoan](https://discourse.slicer.org/u/lassoan)
#### Post date: [September 21, 2021, 4:52pm UTC](https://discourse.slicer.org/t/whats-the-different-between-show3d-smooth-and-the-segments-smooth/19750/3 "2021-09-21T16:52:35Z")
Surface smoothing is required for reconstructing a continuous surface mesh from discrete samples stored in a labelmap volume. This smoothing **does not remove any details from the segmentation**. If you set surface smoothing to 0 then you will see the discrete samples instead of the reconstructed surface (each voxel of the labelmap will appear as a cube).
Smoothing effect is for **removing irrelevant details** (i.e., surface noise, speckled, small holes) from the segmentation.
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### Author:  [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)
#### Post date: [September 22, 2021, 3:58am UTC](https://discourse.slicer.org/t/whats-the-different-between-show3d-smooth-and-the-segments-smooth/19750/4 "2021-09-22T03:58:21Z")
Thank you very much!