Using scarf joint seam (countour, countour and hole) drastically reduces quality of the smooth surfaces for objects with protruding parts #992

New Issue

MrUnknownDE · 2026-04-05T16:40:14+02:00

MrUnknownDE commented

2026-04-05 16:40:14 +02:00

Originally created by @Lim-Kid on 1/23/2026

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

2.3.1, 2.3.0

Operating System (OS)

Windows

OS Version

10

Additional system information

No response

Printer

Creality K1

How to reproduce

Create 2 cylinders (see the attachments) one is thinner than another and perpendicular to the 1st one.
Assemble both cylinders into one part where the 2nd cylinder is protruding from outer wall of the first one at 1/2 of the height.
Select Contour option for Scarf Joint Seam, all others settings can be left by default (layer height is not important, 0.16 is fine for reproducing)
Slice the plate

Actual results

you will see different patterns/stripes created on the places where additional parts protrude, hence those stripes are printed in very low quality. other parts also degrade in quality. See the attachments.

Expected results

using scarf contour should not negatively affect smoothness of the surface , it should look identical or better than with option NONE

Project file & Debug log uploads

not needed

Checklist of files to include

Log file
Project file

Anything else?

in the attached pictures you will find several examples.
With scarf contour applied to the cylinder w/o protruding parts (surface does not change)
With scarf not applied to the cylinder with protruding parts (surface is not affected)
With scarf contour applied to the cylinder with protruding parts (surface gets worse)
other parts with similar effects

*Originally created by @Lim-Kid on 1/23/2026* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version 2.3.1, 2.3.0 ### Operating System (OS) Windows ### OS Version 10 ### Additional system information _No response_ ### Printer Creality K1 ### How to reproduce 1. Create 2 cylinders (see the attachments) one is thinner than another and perpendicular to the 1st one. 2. Assemble both cylinders into one part where the 2nd cylinder is protruding from outer wall of the first one at 1/2 of the height. 3. Select Contour option for Scarf Joint Seam, all others settings can be left by default (layer height is not important, 0.16 is fine for reproducing) 4. Slice the plate ![Image](https://github.com/user-attachments/assets/bcc1805d-39da-40dd-a28a-ce48a8bdb062) ### Actual results you will see different patterns/stripes created on the places where additional parts protrude, hence those stripes are printed in very low quality. other parts also degrade in quality. See the attachments. ![Image](https://github.com/user-attachments/assets/0c8718bc-9e8e-4cdc-b28f-f4a36f6906bc) ### Expected results using scarf contour should not negatively affect smoothness of the surface , it should look identical or better than with option NONE ### Project file & Debug log uploads not needed ### Checklist of files to include - [ ] Log file - [ ] Project file ### Anything else? in the attached pictures you will find several examples. With scarf contour applied to the cylinder w/o protruding parts (surface does not change) With scarf not applied to the cylinder with protruding parts (surface is not affected) With scarf contour applied to the cylinder with protruding parts (surface gets worse) other parts with similar effects ![Image](https://github.com/user-attachments/assets/bcc1805d-39da-40dd-a28a-ce48a8bdb062)

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

1 Participants

Notifications

Due Date

No due date set.

Dependencies

No dependencies set.

Reference: github/OrcaSlicer#992