# Help on naked edges

**URL:** <https://discourse.mcneel.com/t/help-on-naked-edges/113000>\
**Category:** Rhino\
**Tags:** nakededges\
**Created:** [November 23, 2020, 6:50pm UTC](https://discourse.mcneel.com/t/help-on-naked-edges/113000 "2020-11-23T18:50:31Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![david.getragu](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/david.getragu/32/258104_2.png) [@david.getragu](https://discourse.mcneel.com/u/david.getragu)\
**Post date:** [November 23, 2020, 6:50pm UTC](https://discourse.mcneel.com/t/help-on-naked-edges/113000/1 "2020-11-23T18:50:31Z")

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Hi all,

I am new in 3D and was wondering how do you guys proceed in cases like the one in the screenshot? I had two surfaces merged into one but they are really not “one”. I wish I could be more technically precise.  
EDIT: adding .3dm as indicated, thank you! [NakedEdges.3dm](https://discourse.mcneel.com/uploads/short-url/gunnGAyfeawqmKQtXgrN0yJRV5T.3dm) (9.1 MB)

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**Author:** ![david.getragu](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/david.getragu/32/258104_2.png) [@david.getragu](https://discourse.mcneel.com/u/david.getragu)\
**Post date:** [November 23, 2020, 6:51pm UTC](https://discourse.mcneel.com/t/help-on-naked-edges/113000/2 "2020-11-23T18:51:01Z")

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![Screenshot 2020-11-23 at 19.48.54](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/0/3/f/03fe9e461bb8626d66af3e7bafc44b56b9afbb37.png)

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**Author:** ![davidcockey](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/davidcockey/32/732604_2.png) [@davidcockey](https://discourse.mcneel.com/u/davidcockey)\
**Post date:** [November 23, 2020, 7:05pm UTC](https://discourse.mcneel.com/t/help-on-naked-edges/113000/3 "2020-11-23T19:05:41Z")

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I moved your question to the Rhino category.

Questions such as this one usually receive better answers if a .3dm file with the geometry is included. The file can be uploaded by dragging it to where posts are typed, or by clicking on the vertical arrow icon above where posts are typed.

MatchSrf can be used to bring edges close enough to be joined.

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<div class="post-metadata">

**Author:** ![david.getragu](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/david.getragu/32/258104_2.png) [@david.getragu](https://discourse.mcneel.com/u/david.getragu)\
**Post date:** [November 23, 2020, 7:41pm UTC](https://discourse.mcneel.com/t/help-on-naked-edges/113000/4 "2020-11-23T19:41:45Z")

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Thank you. I am trying to get a solid out of that model. Originally it was containing meshes which I’m turning into surfaces (via MeshToNURB, to later join them). Unfortunately I cannot MatchSrf anything now as they are part of the same surface.

I guess I need to get familiar with all these concepts, as I am blocked now and cannot move on w/o any 3D background, unfortunately.

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**Author:** ![pascal](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/pascal/32/479395_2.png) [@pascal](https://discourse.mcneel.com/u/pascal)\
**Post date:** [November 23, 2020, 7:48pm UTC](https://discourse.mcneel.com/t/help-on-naked-edges/113000/5 "2020-11-23T19:48:28Z")

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Hello - please see

> **[Learning to use Rhino - Tutorials Collection](https://www.rhino3d.com/tutorials/)**

  
Rhino deals with surfaces and polysurfaces (Joined edge to edge). To work at the surface level, you need to `Explode` or `ExtractSrf` the polysurface faces. That sais, if the goal is to make something smooth, `MeshToNurbs` is not going to be your friend, but V7 `ToSubD` might.

-Pascal