# Surfece Registration: superimposition of two model - SlicerCMF 

**URL:** https://discourse.slicer.org/t/surfece-registration-superimposition-of-two-model-slicercmf/16290
**Category:** Support
**Tags:** cmf
**Created:** [March 1, 2021, 4:44pm UTC](https://discourse.slicer.org/t/surfece-registration-superimposition-of-two-model-slicercmf/16290 "2021-03-01T16:44:59Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Fede](https://avatars.discourse-cdn.com/v4/letter/f/9fc348/32.png) [@Fede](https://discourse.slicer.org/u/Fede)
#### Post date: [March 1, 2021, 4:44pm UTC](https://discourse.slicer.org/t/surfece-registration-superimposition-of-two-model-slicercmf/16290/1 "2021-03-01T16:44:59Z")

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Hi, I have a problem and I need help. I need to superimpose a 3d model (an stl file imported as segmentation) to a CT segmentation and I would like to use the SlicerCMF plug-in. The problem is that when I select the module Surfece Registration when I try to select the fixed model and the moving model nether the stl model and the TC segmentation appears in the drop down menu.  
How can I solve this problem? Than you in advance!

[Schermata 2021-03-01 alle 17.33.17|690x431](upload://m8

 ![Schermata 2021-03-01 alle 17.33.38](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/2/5/25a288910fa21e110e46322be1307c573330c86b.jpeg) ![Schermata 2021-03-01 alle 17.33.42](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/2/2/22a90524ddcd6e3d88359f38746d192346fc56af.jpeg) ![Schermata 2021-03-01 alle 17.33.45](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/9/0/902b507ee521575328e529dc28a42a8bee1abf22.jpeg) YgToxjkbR14kQgfeqERxCdxKz.jpeg)