# Mesh split

**URL:** <https://discourse.mcneel.com/t/mesh-split/91661>\
**Category:** Rhino for Windows\
**Created:** [November 7, 2019, 9:01am UTC](https://discourse.mcneel.com/t/mesh-split/91661 "2019-11-07T09:01:10Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![peimingcc](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/peimingcc/32/147151_2.png) [@peimingcc](https://discourse.mcneel.com/u/peimingcc)\
**Post date:** [November 7, 2019, 9:01am UTC](https://discourse.mcneel.com/t/mesh-split/91661/1 "2019-11-07T09:01:10Z")

</div>

Hi all,

I’m trying to split the mesh terrain into zones with the curves projected on its surface (so that I can edit them individually). It didn’t work out for me with meshsplit.

 ![pic](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/f/b/fb357e07e7c40103aff85c4d1b6d6f6d69066d82.jpeg)  

> **[model.3dm](https://drive.google.com/file/d/1jowGHQ6o0Xc8GOvwniCVUnu33iZWbrxe/view?usp=drive_open)**
>
> Google Drive file.

Any suggestions?

Thanks.

---

<div class="post-metadata">

**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 7, 2019, 4:34pm UTC](https://discourse.mcneel.com/t/mesh-split/91661/2 "2019-11-07T16:34:54Z")

</div>

Hello - this will be hard - the mesh is quite messy to begin with - lots of non-manifold edges and these are along the curves too, which makes me think you’ve already tried to split this thing? Is there a cleaner version of this mesh?

-Pascal

---

<div class="post-metadata">

**Author:** ![peimingcc](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/peimingcc/32/147151_2.png) [@peimingcc](https://discourse.mcneel.com/u/peimingcc)\
**Post date:** [November 8, 2019, 10:35pm UTC](https://discourse.mcneel.com/t/mesh-split/91661/3 "2019-11-08T22:35:56Z")

</div>

Hi Pascal,

This is the mesh I generated with Holo’s TerrainMesh tool. I tried to repair it and uploaded a new file with the contour in case you need it.

Thanks.

> **[model.3dm](https://drive.google.com/file/d/1odZqnT3-3ENbtie2KVQoIETCzcimMDWO/view?usp=drive_open)**
>
> Google Drive file.

---

<div class="post-metadata">

**Author:** ![peimingcc](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/peimingcc/32/147151_2.png) [@peimingcc](https://discourse.mcneel.com/u/peimingcc)\
**Post date:** [November 8, 2019, 10:38pm UTC](https://discourse.mcneel.com/t/mesh-split/91661/4 "2019-11-08T22:38:24Z")

</div>

Is there a way to do it? I like the detail from the mesh terrain. I think a polysurface might be easier to work with but it lost so much detail compare to mesh, especially this is not a dramatic terrain…

---

<div class="post-metadata">

**Author:** ![GHwiz](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/ghwiz/32/767829_2.png) [@GHwiz](https://discourse.mcneel.com/u/GHwiz)\
**Post date:** [November 8, 2019, 10:41pm UTC](https://discourse.mcneel.com/t/mesh-split/91661/5 "2019-11-08T22:41:30Z")

</div>

Make sure your curves are touching the perimeter of the square. Also you can extrude your curves into breps, do brep to simple mesh, then do mesh/mesh split