# Patch problem

**URL:** <https://discourse.mcneel.com/t/patch-problem/181491>\
**Category:** Rhino\
**Tags:** windows\
**Created:** [May 6, 2024, 9:25am UTC](https://discourse.mcneel.com/t/patch-problem/181491 "2024-05-06T09:25:38Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![gurkan\_bozkurt](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/gurkan_bozkurt/32/694223_2.png) [@gurkan\_bozkurt](https://discourse.mcneel.com/u/gurkan_bozkurt)\
**Post date:** [May 6, 2024, 9:25am UTC](https://discourse.mcneel.com/t/patch-problem/181491/1 "2024-05-06T09:25:38Z")

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I have simple closed curves that I need to patch but it gives me these results.

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/e/0/d/e0d7a56e9abd47eb814a9a9db51bfbf9a3aee91c.png)

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/8/5/4/854c2cee0e58294a5c6db336a4fe74edd7d9bff7.png)

Am I missing something?

[Patch test.3dm](https://discourse.mcneel.com/uploads/short-url/1yozie12k2TGPnu8Zf1WHEsTbXI.3dm) (25.6 KB)

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**Author:** ![Normand](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/normand/32/476050_2.png) [@Normand](https://discourse.mcneel.com/u/Normand)\
**Post date:** [May 6, 2024, 10:00am UTC](https://discourse.mcneel.com/t/patch-problem/181491/2 "2024-05-06T10:00:35Z")

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Hi @gurkan_bozkurt  
What result are you expecting? You have two closed curves, and patch is trying to create a single surface that spans both those curves. If you are expecting two surfaces, run the operation two times. Also, you are 4470 km’s away from world origin in meters - that will cause floating point errors on most commands, so it might be a good idea to move your geometry closer to W0,0,0.  
Here’s the result of Patch with the geometry moved to 0,0,0:

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/a/3/3/a33e8469802e841556bd04958f4f4bb10a4d0cdc.png)  
I don’t know if that’s the expected result? 🙂  
HTH, Jakob

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**Author:** ![encephalon](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/encephalon/32/611970_2.png) [@encephalon](https://discourse.mcneel.com/u/encephalon)\
**Post date:** [May 6, 2024, 10:45am UTC](https://discourse.mcneel.com/t/patch-problem/181491/3 "2024-05-06T10:45:26Z")

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a further note might be questioning the need for patch in general, as it seems it might be a pretty straight forward geometry, why not draw the profile and loft or better extrude it?

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**Author:** ![gurkan\_bozkurt](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/gurkan_bozkurt/32/694223_2.png) [@gurkan\_bozkurt](https://discourse.mcneel.com/u/gurkan_bozkurt)\
**Post date:** [May 6, 2024, 11:40am UTC](https://discourse.mcneel.com/t/patch-problem/181491/4 "2024-05-06T11:40:32Z")

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There is some deformation on the steel and these points are the real life points that I got from site. Patch is for visualization mostly.

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<div class="post-metadata">

**Author:** ![gurkan\_bozkurt](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/gurkan_bozkurt/32/694223_2.png) [@gurkan\_bozkurt](https://discourse.mcneel.com/u/gurkan_bozkurt)\
**Post date:** [May 6, 2024, 11:41am UTC](https://discourse.mcneel.com/t/patch-problem/181491/5 "2024-05-06T11:41:31Z")

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Thanks a lot. I forget about floating point thing every 2 to 3 months :DD