# Resolving Markup Interaction Slowdown on Model Nodes in 3D Viewer

**URL:** <https://discourse.slicer.org/t/resolving-markup-interaction-slowdown-on-model-nodes-in-3d-viewer/38010>\
**Category:** Development\
**Created:** [August 23, 2024, 8:18am UTC](https://discourse.slicer.org/t/resolving-markup-interaction-slowdown-on-model-nodes-in-3d-viewer/38010 "2024-08-23T08:18:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![park](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/park/32/5717_2.png) [@park](https://discourse.slicer.org/u/park)\
**Post date:** [August 23, 2024, 8:18am UTC](https://discourse.slicer.org/t/resolving-markup-interaction-slowdown-on-model-nodes-in-3d-viewer/38010/1 "2024-08-23T08:18:52Z")

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Hi all,

Like the video below, the interaction speed of the `Markups` slows down significantly when hovering over the `ModelNode` (in the video, it’s a tooth scan), causing the FPS to drop to around 8. Is there a way to resolve this issue?

I believe the slowdown might be due to the markup performing some calculations with the model node. Is it possible to remove this from the observer using Python?"

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<div class="post-metadata">

**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:** [August 23, 2024, 1:01pm UTC](https://discourse.slicer.org/t/resolving-markup-interaction-slowdown-on-model-nodes-in-3d-viewer/38010/2 "2024-08-23T13:01:03Z")

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What if you change this mode:

![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/c/e/ce5f20b04664c98a0412d27cbf59b6109d442ac9.png)

If that works you should also be able to find how to do in python pretty easily.