Supports cause incorrect layer count #907

New Issue

MrUnknownDE · 2026-04-05T16:34:41+02:00

MrUnknownDE commented

2026-04-05 16:34:41 +02:00

Originally created by @dprentis on 2/2/2026

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

2.3.1

Operating System (OS)

Linux

OS Version

Ubuntu 24.04 LTS

Additional system information

No response

Printer

Elegoo Centauri Carbon

How to reproduce

Import any model requiring supports
enable support generation
select any support type except for tree (auto) -> Default (grid/Organic), tree (auto) -> Organic.
when gcode is generated, notice that the layer count does not correspond to the model and layer height. It will be larger depending on the volume of supports (the more supports there are, the greater the layer count will potentially be). Conversely, if no supports are actually generated, the layer count will be correct.

Actual results

The layer count is larger than model height / layer height eg. 120mm model with 0.2mm layers has 994 layers

Expected results

The layer count should remain unchanged regardless of the tree support type used eg. 120mm model with 0.2mm layers should have ~600 layers.

Project file & Debug log uploads

fixture.zip

Checklist of files to include

Log file
Project file

Anything else?

No response

*Originally created by @dprentis on 2/2/2026* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version 2.3.1 ### Operating System (OS) Linux ### OS Version Ubuntu 24.04 LTS ### Additional system information _No response_ ### Printer Elegoo Centauri Carbon ### How to reproduce 1. Import any model requiring supports 2. enable support generation 3. select any support type **except for** tree (auto) -> Default (grid/Organic), tree (auto) -> Organic. 4. when gcode is generated, notice that the layer count does not correspond to the model and layer height. It will be larger depending on the volume of supports (the more supports there are, the greater the layer count will potentially be). Conversely, if no supports are actually generated, the layer count will be correct. ### Actual results The layer count is larger than model height / layer height eg. 120mm model with 0.2mm layers has 994 layers ### Expected results The layer count should remain unchanged regardless of the tree support type used eg. 120mm model with 0.2mm layers should have ~600 layers. ### Project file & Debug log uploads [fixture.zip](https://github.com/user-attachments/files/25002999/fixture.zip) ### Checklist of files to include - [ ] Log file - [x] Project file ### Anything else? _No response_

MrUnknownDE closed this issue

2026-04-05 16:34:41 +02:00

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Reference: github/OrcaSlicer#907