# Converting open surface model into segmentation

**URL:** <https://discourse.slicer.org/t/converting-open-surface-model-into-segmentation/19034>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [August 3, 2021, 12:58am UTC](https://discourse.slicer.org/t/converting-open-surface-model-into-segmentation/19034 "2021-08-03T00:58:17Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![siaeleni](https://avatars.discourse-cdn.com/v4/letter/s/b4bc9f/32.png) [@siaeleni](https://discourse.slicer.org/u/siaeleni)\
**Post date:** [August 3, 2021, 12:58am UTC](https://discourse.slicer.org/t/converting-open-surface-model-into-segmentation/19034/1 "2021-08-03T00:58:18Z")

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Hello,  
I am wondering whether the result from the segmentation is correct.  
I load a .stl file and, right-click “convert model to segmentation mode”.  
The result that I get seems weird, but I am not sure if that is correct. Please see attached image.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/4/0/40651072741f52ea54824141bf8cfd78bb950734.png)

Thanks

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<div class="post-metadata">

**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:** [August 3, 2021, 1:57am UTC](https://discourse.slicer.org/t/converting-open-surface-model-into-segmentation/19034/2 "2021-08-03T01:57:29Z")

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Segmentation can be imported from a closed surface, but it looks like you have an open surface (surface with many large holes). You would need to close the surface before you can import it into a segmentation.

You can give it a try to fill the holes after you imported the surface into a segment, using [SurfaceWrapSolidify extension](https://github.com/sebastianandress/Slicer-SurfaceWrapSolidify#surface-wrap-solidify).

If this does not work well then you can slightly modify this wrap solidify effect to allow it to take a model node as input (not a segment) and then it is almost sure that it will be able to fill all the holes nicely.