Problematic seam behavior #1729

New Issue

MrUnknownDE · 2026-04-05T19:28:56+02:00

MrUnknownDE commented

2026-04-05 19:28:56 +02:00

Originally created by @DImagine on 11/3/2025

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

2.3.2-dev Build c105d42

Operating System (OS)

Windows

OS Version

Win 11

Additional system information

No response

Printer

BL A1 mini

How to reproduce

The attached ZIP archive includes the 3MF file and screenshots demonstrating the issue.

Problematic seam behavior.zip

Actual results

When the green zones for seam placement are defined as shown, the seam string breaks at one point, and on that layer the seam appears in a completely unexpected distant location.
This behavior seems entirely unexpected and incorrect to me.

Expected results

There should be one continuous seam string.

Project file & Debug log uploads

Problematic seam behavior.zip

Checklist of files to include

Log file
Project file

Anything else?

No response

*Originally created by @DImagine on 11/3/2025* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version 2.3.2-dev Build c105d42 ### Operating System (OS) Windows ### OS Version Win 11 ### Additional system information _No response_ ### Printer BL A1 mini ### How to reproduce The attached ZIP archive includes the 3MF file and screenshots demonstrating the issue. [Problematic seam behavior.zip](https://github.com/user-attachments/files/23298377/Problematic.seam.behavior.zip) ### Actual results When the green zones for seam placement are defined as shown, the seam string breaks at one point, and on that layer the seam appears in a completely unexpected distant location. This behavior seems entirely unexpected and incorrect to me. <p float="left"> <img src="https://github.com/user-attachments/assets/1cdba013-5d09-4e61-a2c5-01aec351c322" width="33%" /> <img src="https://github.com/user-attachments/assets/4fbce9df-84df-418c-a21d-3052f6805d27" width="33%" /> <img src="https://github.com/user-attachments/assets/8c0e3487-d934-4466-a5e0-2286d7e8b5f3" width="33%" /> </p> ### Expected results There should be one continuous seam string. ### Project file & Debug log uploads [Problematic seam behavior.zip](https://github.com/user-attachments/files/23298525/Problematic.seam.behavior.zip) ### Checklist of files to include - [ ] Log file - [x] Project file ### Anything else? _No response_

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Reference: github/OrcaSlicer#1729