# Cut circular shape out of 3d map mesh

**URL:** <https://discourse.mcneel.com/t/cut-circular-shape-out-of-3d-map-mesh/158248>\
**Category:** Rhino for Windows\
**Tags:** windows, trim, mesh, meshtools, meshsplit, meshbooleanunion\
**Created:** [April 13, 2023, 4:24pm UTC](https://discourse.mcneel.com/t/cut-circular-shape-out-of-3d-map-mesh/158248 "2023-04-13T16:24:04Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Nicolas\_Widmer](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/nicolas_widmer/32/447414_2.png) [@Nicolas\_Widmer](https://discourse.mcneel.com/u/Nicolas_Widmer)\
**Post date:** [April 13, 2023, 4:24pm UTC](https://discourse.mcneel.com/t/cut-circular-shape-out-of-3d-map-mesh/158248/1 "2023-04-13T16:24:04Z")

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Hi,

I would’t even call myself a beginner but I have been experimenting a little bit and wanted to try different things I couldn’t find any tutorials about.  
I’m trying to cut this shape out of this mesh of buildings just like I did with the terrain mesh.

 ![Screenshot (35)](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/8/d/7/8d716a0ba03f54eceba655948bd30bc1f3b0103f.jpeg)

But when I try to do the same with the Buildings mesh it doesn’t work since it’s not a closed mesh right? Here is the result of mesh splitting it:

 ![Screenshot (33)](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/c/b/f/cbf16936300ee6b4968711124e11ba5fba74cc3f.jpeg)  
 ![Screenshot (37)](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/a/f/5/af5efdf95a5f809d05ad26f59f6a549bc775cb86.jpeg)

Can anyone tell me how I should proceed?

I’m trying to join the two meshes and insetting it into a solid.

 ![Screenshot (34)](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/5/9/1/591dbdff7de98b44ce0d0a25ed988984ed2dcf73.jpeg)

Thanks in advance!