Bridge layers anchor to solid infill not to perimeters, overlapping the print a lot #1712

New Issue

MrUnknownDE · 2026-04-05T19:20:31+02:00

MrUnknownDE commented

2026-04-05 19:20:31 +02:00

Originally created by @celtare21 on 11/4/2025

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

2.3.1

Operating System (OS)

Windows

OS Version

Windows 11

Additional system information

No response

Printer

ZeroG Mercury One

How to reproduce

Rounded+Bridge+Test+v2(6).zip
Slice 3mf file with 3 walls.

Actual results

The bridge protrudes over the walls and solid infill a lot, causing overextrusion on the top layer, specially with thick external layers:

The more walls, the more it protrudes in the print:

This can be easier seen with a 50% bridge density:

The bridge wants to anchor to the solid infill, not to the perimeter.

Expected results

The bridge to anchor to the perimeter, not the solid infill.

Enabling

To anything but "None" makes the bridge anchor over a single wall.

Lowering the nozzle diameter and wall count also gives those results:

For some reason, turning to 10 walls leaves no internal solid infill which produces the desired bridge:

Seems related to: Unsupported bridges #6642

Project file & Debug log uploads

Rounded+Bridge+Test+v2(6).zip

Checklist of files to include

Log file
Project file

Anything else?

No response

*Originally created by @celtare21 on 11/4/2025* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version 2.3.1 ### Operating System (OS) Windows ### OS Version Windows 11 ### Additional system information _No response_ ### Printer ZeroG Mercury One ### How to reproduce [Rounded+Bridge+Test+v2(6).zip](https://github.com/user-attachments/files/23339331/Rounded%2BBridge%2BTest%2Bv2.6.zip) Slice 3mf file with 3 walls. ### Actual results <img width="752" height="746" alt="Image" src="https://github.com/user-attachments/assets/33b2d811-82b0-463f-a6a4-d6166b05cf5e" /> <img width="733" height="723" alt="Image" src="https://github.com/user-attachments/assets/77753cd6-114a-4727-81dc-dc81f2af211a" /> The bridge protrudes over the walls and solid infill a lot, causing overextrusion on the top layer, specially with thick external layers: <img width="774" height="725" alt="Image" src="https://github.com/user-attachments/assets/041723b8-26fa-4024-8a71-abdb73cf8525" /> The more walls, the more it protrudes in the print: <img width="1754" height="823" alt="Image" src="https://github.com/user-attachments/assets/ed18f8f0-bb19-407a-ab85-d7b308c8756b" /> This can be easier seen with a 50% bridge density: <img width="937" height="791" alt="Image" src="https://github.com/user-attachments/assets/bc156062-2471-4dda-8583-b38c0b617832" /> The bridge wants to anchor to the solid infill, not to the perimeter. ### Expected results The bridge to anchor to the perimeter, not the solid infill. <img width="967" height="813" alt="Image" src="https://github.com/user-attachments/assets/89d5cc5d-0f6f-4482-9a7d-1e69ed1c4244" /> <img width="857" height="780" alt="Image" src="https://github.com/user-attachments/assets/864a4abf-8d50-4e88-9cc5-72de6ff55da9" /> Enabling <img width="361" height="51" alt="Image" src="https://github.com/user-attachments/assets/d600a820-dda5-4745-8ee5-7d57d0fa4458" /> To anything but "None" makes the bridge anchor over a single wall. Lowering the nozzle diameter and wall count also gives those results: <img width="831" height="719" alt="Image" src="https://github.com/user-attachments/assets/f1374b4a-7208-4b5c-bebd-cf2eb86f954e" /> For some reason, turning to 10 walls leaves no internal solid infill which produces the desired bridge: <img width="1702" height="805" alt="Image" src="https://github.com/user-attachments/assets/ee94bc6f-af68-4fca-b92a-2b31e209a0f0" /> Seems related to: [Unsupported bridges #6642](https://github.com/SoftFever/OrcaSlicer/issues/6642) ### Project file & Debug log uploads [Rounded+Bridge+Test+v2(6).zip](https://github.com/user-attachments/files/23339604/Rounded%2BBridge%2BTest%2Bv2.6.zip) ### Checklist of files to include - [ ] Log file - [x] Project file ### Anything else? _No response_

MrUnknownDE closed this issue

2026-04-05 19:20:31 +02:00

Sign in to join this conversation.

No Label bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug

1 Participants

Notifications

Due Date

No due date set.

Dependencies

No dependencies set.

Reference: github/OrcaSlicer#1712