"Aligned back" seam option broken on mirrored parts #1020

New Issue

MrUnknownDE · 2026-04-05T16:42:22+02:00

MrUnknownDE commented

2026-04-05 16:42:22 +02:00

Originally created by @Ataraxia-Mechanica on 1/20/2026

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

Nightly 2026/01/14

Operating System (OS)

Windows

OS Version

Windows 10

Additional system information

No response

Printer

Voron 0

How to reproduce

Mirror a part on X axis

Actual results

Seam is in front regardless of orientation

Expected results

Seam is in the back

Project file & Debug log uploads

anyball.zip

Checklist of files to include

Log file
Project file

Anything else?

No response

*Originally created by @Ataraxia-Mechanica on 1/20/2026* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version Nightly 2026/01/14 ### Operating System (OS) Windows ### OS Version Windows 10 ### Additional system information _No response_ ### Printer Voron 0 ### How to reproduce Mirror a part on X axis <img width="764" height="760" alt="Image" src="https://github.com/user-attachments/assets/02b3bd28-56db-45a7-ae93-79ba163230a8" /> ### Actual results Seam is in front regardless of orientation <img width="623" height="748" alt="Image" src="https://github.com/user-attachments/assets/a954399a-01bf-4f13-ad32-c74dda6092fe" /> <img width="1134" height="916" alt="Image" src="https://github.com/user-attachments/assets/cb9294be-1cf9-4c66-b97e-1e55014d02ea" /> ### Expected results Seam is in the back ### Project file & Debug log uploads [anyball.zip](https://github.com/user-attachments/files/24736793/anyball.zip) ### Checklist of files to include - [ ] Log file - [x] Project file ### Anything else? _No response_

MrUnknownDE closed this issue

2026-04-05 16:42:22 +02:00

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Reference: github/OrcaSlicer#1020