# How to create layer hierarchies for gltf export

**URL:** <https://discourse.slicer.org/t/how-to-create-layer-hierarchies-for-gltf-export/46432>\
**Category:** OpenAnatomy\
**Created:** [March 11, 2026, 12:24pm UTC](https://discourse.slicer.org/t/how-to-create-layer-hierarchies-for-gltf-export/46432 "2026-03-11T12:24:17Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Marcela\_Cardenas](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/marcela_cardenas/32/82050_2.png) [@Marcela\_Cardenas](https://discourse.slicer.org/u/Marcela_Cardenas)\
**Post date:** [March 11, 2026, 12:24pm UTC](https://discourse.slicer.org/t/how-to-create-layer-hierarchies-for-gltf-export/46432/1 "2026-03-11T12:24:17Z")

</div>

Hello,

I am trying to export a model using the OpenAnatomy Export module, creating subcategories for tissues (such as skeletal system, muscular system, etc. as seen here: [Online 3D Viewer](https://3dviewer.net/#model=https://raw.githubusercontent.com/lassoan/Test/master/SPL-Abdominal-Atlas.gltf) ). I have tried creating separate segmentations for each category and putting them all inside a folder in slicer to export as one using the module, but the export always fails. If I export each segmentation individually, it works. I can combine all nodes into a single segment, but then I lose the hierarchy. What would be the correct approach?