incorrect overhang visualization #1661

New Issue

MrUnknownDE · 2026-04-05T18:58:37+02:00

MrUnknownDE commented

2026-04-05 18:58:37 +02:00

Originally created by @discip on 11/10/2025

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

latest build a7adeb6305

Operating System (OS)

Windows

How to reproduce

Import this overhang test: https://www.printables.com/model/733066-angle-overhang-test?
Activate: View => Show Overhang
Set the Threshold angle to 40.
Compare the preview of overhang to the sliced result.

Actual results

In the sliced result supports are generated for all angles <= 40°.
In the preview however only slopes with angles < 40° are marked.

Expected results

Ideally in both cases angles <= 40° should be supported.

Project file & Debug log uploads

*Originally created by @discip on 11/10/2025* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version latest build https://github.com/SoftFever/OrcaSlicer/commit/a7adeb6305fe31b62072e80ef0021b17c77b213a ### Operating System (OS) Windows ### How to reproduce 1. Import this overhang test: https://www.printables.com/model/733066-angle-overhang-test? 2. Activate: **`View`** => **`Show Overhang`** 3. Set the **`Threshold angle`** to **`40`**. 4. Compare the preview of overhang to the sliced result. ### Actual results In the sliced result supports are generated for all `angles <= 40°`. In the preview however only slopes with `angles < 40°` are marked. ### Expected results Ideally in both cases **`angles <= 40°`** should be supported. ### Project file & Debug log uploads <img width="1029" height="568" alt="Image" src="https://github.com/user-attachments/assets/d34a5c60-61b4-4c99-8c5d-27aeb7ddc419" /> <img width="1029" height="568" alt="Image" src="https://github.com/user-attachments/assets/ecbdba1a-1305-4f2b-908c-eb64c05fa2b4" />

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Reference: github/OrcaSlicer#1661