Cutting objects make them non-manifold #2062

New Issue

MrUnknownDE · 2026-04-05T23:05:46+02:00

MrUnknownDE commented

2026-04-05 23:05:46 +02:00

Originally created by @rkarlsba on 9/26/2025

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

2.3.1-beta-3x0x36d, but older also tested

Operating System (OS)

macOS

OS Version

15.6.1

Additional system information

CPU: Apple M2 Pro
RAM: 16GB

Printer

Bambu X1C

How to reproduce

Find a large object, I started with https://www.thingiverse.com/thing:6376225 today, but I've seen this on several other objects
The model is too large, so I want to cut it, fine
I cut it

Actual results

The reminding parts are non-manifold, meaning they may be printable, but I'd never know.

Expected results

The parts are whole

Project file & Debug log uploads

Lethal_Company_Helmet_v1.0-err.zip
logs.zip

Checklist of files to include

Log file
Project file

Anything else?

*Originally created by @rkarlsba on 9/26/2025* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version 2.3.1-beta-3x0x36d, but older also tested ### Operating System (OS) macOS ### OS Version 15.6.1 ### Additional system information CPU: Apple M2 Pro RAM: 16GB ### Printer Bambu X1C ### How to reproduce 1. Find a large object, I started with https://www.thingiverse.com/thing:6376225 today, but I've seen this on several other objects 2. The model is too large, so I want to cut it, fine 3. I cut it ### Actual results The reminding parts are non-manifold, meaning they may be printable, but I'd never know. ### Expected results The parts are whole ### Project file & Debug log uploads [Lethal_Company_Helmet_v1.0-err.zip](https://github.com/user-attachments/files/22567749/Lethal_Company_Helmet_v1.0-err.zip) [logs.zip](https://github.com/user-attachments/files/22567748/logs.zip) ### Checklist of files to include - [x] Log file - [x] Project file ### Anything else? <img width="2096" height="1828" alt="Image" src="https://github.com/user-attachments/assets/2a7171a0-db57-417a-9887-768a3b14674e" /> <img width="2364" height="1738" alt="Image" src="https://github.com/user-attachments/assets/35816cee-bc77-404c-bbbe-81117faa9e82" />

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Dependencies

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Reference: github/OrcaSlicer#2062