# Place markups through visible model

**URL:** <https://discourse.slicer.org/t/place-markups-through-visible-model/23945>\
**Category:** Support\
**Created:** [June 19, 2022, 1:35pm UTC](https://discourse.slicer.org/t/place-markups-through-visible-model/23945 "2022-06-19T13:35:41Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![JuanPinera](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/juanpinera/32/15701_2.png) [@JuanPinera](https://discourse.slicer.org/u/JuanPinera)\
**Post date:** [June 19, 2022, 1:35pm UTC](https://discourse.slicer.org/t/place-markups-through-visible-model/23945/1 "2022-06-19T13:35:42Z")

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Hi, I want to put a fiducial on an object that has another object placed in front of it in semi-transparency. The problem I have is that it detects the surface and places it in the second object.  
I have searched here: [Slicer: vtkMRMLModelDisplayNode Class Reference](https://apidocs.slicer.org/v4.8/classvtkMRMLModelDisplayNode.html)  
but I can’t find the property that disables the interaction in 3d.  
Cloud you help me.  
Thanks

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**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:** [June 21, 2022, 5:52am UTC](https://discourse.slicer.org/t/place-markups-through-visible-model/23945/2 "2022-06-21T05:52:56Z")

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This should be no problem at all. You can make a model non-pickable by disabling `Selectable` property. You can change this property via the Python console:

```auto
getNode('SomeModel').SelectableOff()

```

If you don’t want to type a command into the console then you can install `SlicerVirtualReality` extension. After you install it, you can right-click on a model in the Data module and check/uncheck the `Toggle selectable` option.