Arachne Precise Wall Reduces Line Width Unnecesarily #1956

New Issue

MrUnknownDE · 2026-04-05T21:41:43+02:00

MrUnknownDE commented

2026-04-05 21:41:43 +02:00

Originally created by @MxBrnr on 10/9/2025

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

2.3.0 (stable) through Latest Nightly

Operating System (OS)

Windows

OS Version

All

Additional system information

N/A

Printer

All

How to reproduce

Load project file and slicer.
Use layer slider to view layers 21-50
Change Preview legend to Line Width
Use bottom slider to view line paths of single wall square

Actual results

When printing with a 0.4mm nozzle, line widths set to 0.40mm, and the actual wall width in the model being 0.400mm...
Using Precise Wall with Arachne wall generator causes the line width to be reduced (down to 0.36mm), NOT just the spacing as indicated by the tooltip.

Expected results

Especially considering that this is a single wall feature of the model, no change to the wall spacing is needed, and the line width should never be reduced either beyond the line widths set by the user, or the thickness of the model feature, whichever is smaller.

Project file & Debug log uploads

project and log.zip

Checklist of files to include

Log file
Project file

Anything else?

No response

*Originally created by @MxBrnr on 10/9/2025* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version 2.3.0 (stable) through Latest Nightly ### Operating System (OS) Windows ### OS Version All ### Additional system information N/A ### Printer All ### How to reproduce Load project file and slicer. Use layer slider to view layers 21-50 Change Preview legend to Line Width Use bottom slider to view line paths of single wall square ### Actual results When printing with a 0.4mm nozzle, line widths set to 0.40mm, and the actual wall width in the model being 0.400mm... Using `Precise Wall` with `Arachne` wall generator causes the line width to be reduced (down to 0.36mm), NOT just the spacing as indicated by the tooltip. <img width="665" height="131" alt="Image" src="https://github.com/user-attachments/assets/a662697d-1839-4c31-947f-a8e00412f703" /> <img width="1354" height="1052" alt="Image" src="https://github.com/user-attachments/assets/40d2f26c-ee03-4a8c-aedf-7296ccef3f68" /> ### Expected results Especially considering that this is a single wall feature of the model, no change to the wall spacing is needed, and the line width should never be reduced either beyond the line widths set by the user, or the thickness of the model feature, whichever is smaller. ### Project file & Debug log uploads [project and log.zip](https://github.com/user-attachments/files/22805810/project.and.log.zip) ### Checklist of files to include - [x] Log file - [x] Project file ### Anything else? _No response_

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Reference: github/OrcaSlicer#1956