# 3D rendering bug for models imported to segment?

**URL:** <https://discourse.slicer.org/t/3d-rendering-bug-for-models-imported-to-segment/44892>\
**Category:** Support\
**Created:** [October 27, 2025, 7:18pm UTC](https://discourse.slicer.org/t/3d-rendering-bug-for-models-imported-to-segment/44892 "2025-10-27T19:18:57Z")\
**Posts on this page:** 1\
**Showing post:** 20

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**Author:** ![cpinter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cpinter/32/7995_2.png) [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Post date:** [October 29, 2025, 2:49pm UTC](https://discourse.slicer.org/t/3d-rendering-bug-for-models-imported-to-segment/44892/20 "2025-10-29T14:49:25Z")

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The import feature is quite simple:

1. The [SH plugin creates a new segmentation](https://github.com/Slicer/Slicer/blob/main/Modules/Loadable/Segmentations/SubjectHierarchyPlugins/qSlicerSubjectHierarchySegmentationsPlugin.cxx#L1215) with default options (binary labelmap source)
2. Calls the segmentations logic (`ImportModelToSegmentationNode`), which simply [creates a segment](https://github.com/Slicer/Slicer/blob/main/Modules/Loadable/Segmentations/Logic/vtkSlicerSegmentationsModuleLogic.cxx#L1342) from the model’s polydata and adds it to the segmentation

I found a thread that is about the same thing. It’s from five years ago and I said the same thing; it seems odd that the source representation is labelmap when we import a model to segmentation.

> [@Convert STL model to segmentation node](https://discourse.slicer.org/t/convert-stl-model-to-segmentation-node/8062):
>
> I am having trouble creating a segmentation node from an STL of a 3d scan. The imported transform looks like this: The segmentation has characteristics that are not present on the STL: Help would be much appreciated.

I think it would be more correct adding a line in the SH plugin that sets closed surface as source representation. But again I’m not sure why this was kept like this. @lassoan if you remember please let us know. You see way more use cases than I and there must have been a good reason. Thanks!

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