# Fuse models into one STL file

**URL:** <https://discourse.slicer.org/t/fuse-models-into-one-stl-file/16595>\
**Category:** Support\
**Created:** [March 17, 2021, 2:32pm UTC](https://discourse.slicer.org/t/fuse-models-into-one-stl-file/16595 "2021-03-17T14:32:52Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Marta\_Fernandez](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/marta_fernandez/32/10323_2.png) [@Marta\_Fernandez](https://discourse.slicer.org/u/Marta_Fernandez)\
**Post date:** [March 17, 2021, 2:32pm UTC](https://discourse.slicer.org/t/fuse-models-into-one-stl-file/16595/1 "2021-03-17T14:32:52Z")

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Hello, I have problems using the 3d Slicer trying to export the structures to Stl as one object.

I have import two objects as Stl and link them but they don´t appear as one object.  
I would like to know how I can export them as one object or fuse them as one object.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/a/1/a18707e516ff3a4d025266ca838234ecc1b15236.png)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/3/c/3c52cc9229fcb4aeef8ca274076ff80f60b255fb.png)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/6/f/6f3fcbedb2585f339a920a4006859d837c79ac2b.png)

Greetings and thanks  
A beginer

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<div class="post-metadata">

**Author:** ![Marta\_Fernandez](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/marta_fernandez/32/10323_2.png) [@Marta\_Fernandez](https://discourse.slicer.org/u/Marta_Fernandez)\
**Post date:** [March 17, 2021, 2:33pm UTC](https://discourse.slicer.org/t/fuse-models-into-one-stl-file/16595/2 "2021-03-17T14:33:31Z")

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Hi. I have a problem.  
I would like to export all the projects as an Stl.  
The objects are a fusion of two cranium part that has been imported as two Stl objects.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/e/4/e4c419cef1260b77f113d3e430a7298b80e5d7ba.png)

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/4/1/41a03d99676b8ae5b1b320c2c1c032254e0fc336.png)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/a/1/a18707e516ff3a4d025266ca838234ecc1b15236.png)

Kind regards  
A beginner

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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:** [March 17, 2021, 2:36pm UTC](https://discourse.slicer.org/t/fuse-models-into-one-stl-file/16595/3 "2021-03-17T14:36:13Z")

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If models do not overlap then you can use “Merge models” module. If the models overlap then you can compute Boolean union operation using Combine models module - provided by Sandbox extension (you can install it using Extensions manager; the extension is in Examples category).