# OpenNest - Problem with Nesting Perforated Parts

**URL:** <https://discourse.mcneel.com/t/opennest-problem-with-nesting-perforated-parts/212046>\
**Category:** OpenNest\
**Tags:** windows, grasshopper2, nesting, opennest\
**Created:** [November 6, 2025, 3:32pm UTC](https://discourse.mcneel.com/t/opennest-problem-with-nesting-perforated-parts/212046 "2025-11-06T15:32:44Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Ömer\_Faruk\_ÇİÇEKLİ](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/%C3%B6mer_faruk_%C3%A7i%CC%87%C3%A7ekli%CC%87/32/708521_2.png) [@Ömer\_Faruk\_ÇİÇEKLİ](https://discourse.mcneel.com/u/%C3%96mer_Faruk_%C3%87%C4%B0%C3%87EKL%C4%B0)\
**Post date:** [November 6, 2025, 3:32pm UTC](https://discourse.mcneel.com/t/opennest-problem-with-nesting-perforated-parts/212046/1 "2025-11-06T15:32:44Z")

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**Hello everyone,**

After a lot of effort, I managed to get OpenNest working properly for **non-perforated parts**. However, I’m unable to achieve the same result when working with **perforated parts**.

The issue is that OpenNest recognizes the **outer contour** of a perforated part as one separate piece, and the **inner contour (the hole)** as another separate piece.

What I’m trying to achieve is:

- To have **perforated parts nested as a single, solid piece** (outer and inner curves treated as one object).

- Additionally, if a **hole is large enough** , I’d like **smaller parts to be nested inside** that hole.

I’m attaching two files:

- One contains my original parts.

- The other shows the **desired result** , which I achieved using another software (that I currently don’t have access to).

Could you please help me figure out how to achieve this in OpenNest?

Thanks in advance for your time and support! 🙏

[Nested Parts.3dm](https://discourse.mcneel.com/uploads/short-url/9Tu387gPvgAnjRNWHVoHh6AHHKZ.3dm) (2.6 MB)

[Parts.3dm](https://discourse.mcneel.com/uploads/short-url/oAY6eb2nVwMtooYcF3fIilA7kWL.3dm) (2.6 MB)

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**Author:** ![altamiro.aj](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/altamiro.aj/32/675190_2.png) [@altamiro.aj](https://discourse.mcneel.com/u/altamiro.aj)\
**Post date:** [November 6, 2025, 5:21pm UTC](https://discourse.mcneel.com/t/opennest-problem-with-nesting-perforated-parts/212046/2 "2025-11-06T17:21:23Z")

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I’ve had similar issue, but on the food4rhino page there are examples with this situation that can help fix it, I don’t have the file I used to make it but if I am not mistaken, you can group the contours before entering the nesting node and they will stick together.