# 3D model shifts when changing smoothing parameters

**URL:** <https://discourse.slicer.org/t/3d-model-shifts-when-changing-smoothing-parameters/36737>\
**Category:** Support\
**Created:** [June 12, 2024, 9:22pm UTC](https://discourse.slicer.org/t/3d-model-shifts-when-changing-smoothing-parameters/36737 "2024-06-12T21:22:23Z")\
**Posts on this page:** 1\
**Showing post:** 2

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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:** [June 12, 2024, 9:31pm UTC](https://discourse.slicer.org/t/3d-model-shifts-when-changing-smoothing-parameters/36737/2 "2024-06-12T21:31:47Z")

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Try the latest versions of Slicer. Probably you are seeing the issues described below, which have been fixed.

> [@Accuracy of segmentation smoothing](https://discourse.slicer.org/t/accuracy-of-segmentation-smoothing/34723):
>
> Hello, I am healthcare professional, a general and orthopedic surgeon with over 24 years of active experience. We have been using an FDA approved software for complex surgical planning for the past 8 years. However, due to its increasing cost per seat, we were looking for alternative and free solutions and came across 3D Slicer. I appreciate what Slicer’s existing features provide, and we started evaluating it just a couple of months ago. Besides the great functionalities, I have found subtle …

> **[Slight offset in vtkWindowedSincPolyDataFilter if normalization is enabled](https://discourse.vtk.org/t/slight-offset-in-vtkwindowedsincpolydatafilter-if-normalization-is-enabled/7676/20)**
>
> The fix has been integrated into VTK. To illustrate the effect of what has changed, here is the result (in red) of smoothing a bumpy surface (white), generated by the newly added smoothCylNuttall test: Left: result when using the old Hamming...

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_[View the full topic](https://discourse.slicer.org/t/3d-model-shifts-when-changing-smoothing-parameters/36737)._