Using 0 for support z distance causes interface layers to stop generating as intended #1139

New Issue

MrUnknownDE · 2026-04-05T16:53:18+02:00

MrUnknownDE commented

2026-04-05 16:53:18 +02:00

Originally created by @galaxyman7 on 1/8/2026

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

QIDI Plus 4

How to reproduce

Slice a part that has a 90 degree overhang, and change support to have 0 z distance on the top and bottom. Paint on supports on the overhang. Use manual tree supports, organic type. Observe the difference between interface layers generated when z distance is 0 vs. z distance at 0.2mm.

Actual results

Interface layers are more sparse and are changed to concentric when set to 0 contact distance. They do not support the surface well at all.

0 distance:

0.2 distance (proper interface layers):

Expected results

Setting to 0 distance should just use the same pattern as when it is set to 0.2.

Project file & Debug log uploads

None (sorry, can't upload files due to IT security)

Checklist of files to include

Log file
Project file

Anything else?

This is just an example using one material, but obviously you would use this with a different support material.

*Originally created by @galaxyman7 on 1/8/2026* ### 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 QIDI Plus 4 ### How to reproduce Slice a part that has a 90 degree overhang, and change support to have 0 z distance on the top and bottom. Paint on supports on the overhang. Use manual tree supports, organic type. Observe the difference between interface layers generated when z distance is 0 vs. z distance at 0.2mm. ### Actual results Interface layers are more sparse and are changed to concentric when set to 0 contact distance. They do not support the surface well at all. 0 distance: <img width="728" height="675" alt="Image" src="https://github.com/user-attachments/assets/75ab9800-3dc2-4133-bd85-42444d1f22b1" /> 0.2 distance (proper interface layers): <img width="1117" height="892" alt="Image" src="https://github.com/user-attachments/assets/7cd14fcd-f2cd-40aa-b321-e974479219b3" /> <img width="1018" height="892" alt="Image" src="https://github.com/user-attachments/assets/c057f73f-7b38-4983-a4ea-357cf51fa60d" /> ### Expected results Setting to 0 distance should just use the same pattern as when it is set to 0.2. ### Project file & Debug log uploads None (sorry, can't upload files due to IT security) ### Checklist of files to include - [ ] Log file - [ ] Project file ### Anything else? This is just an example using one material, but obviously you would use this with a different support material.

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Reference: github/OrcaSlicer#1139