Modifiers causing inadequate bottom shells if only modifying a portion of the bottom shell layers. #1844

New Issue

MrUnknownDE · 2026-04-05T20:26:42+02:00

MrUnknownDE commented

2026-04-05 20:26:42 +02:00

Originally created by @jefftopp1984 on 10/23/2025

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

Win11

Additional system information

12th i7, 64GB RAM, Integrated Graphics

Printer

CR-6 SE

How to reproduce

Insert a modifier to only set the bridge layer to print infill first. You can either size some cubes or make a model specifically for it. I made a model specifically for it. Then I had to make a second model to make another modifier to change the area above it to all solid infill so that it would print somewhat correctly.

Actual results

This is with the modifier only on the bridge layer. You can see it prints SPARSE INFILL directly above the bridge and it starts the sparse infill at Z height 4.7 when it should be 5.5. It prints ONLY THE BRIDGE LAYER as the bottom shell!

Expected results

Here is how it SHOULD slice. Once above the modifier, it should slice normally and complete the bottom shell.

Project file & Debug log uploads

No debugging files generated. This is another slicing error just like the internal overhangs that I haven't heard a word about! The sad thing is, ALL SLICERS do this!

Checklist of files to include

Log file
Project file

Anything else?

It's very disappointing that there isn't an option for another slicer that doesn't contain these bugs!

*Originally created by @jefftopp1984 on 10/23/2025* ### 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 Win11 ### Additional system information 12th i7, 64GB RAM, Integrated Graphics ### Printer CR-6 SE ### How to reproduce Insert a modifier to only set the bridge layer to print infill first. You can either size some cubes or make a model specifically for it. I made a model specifically for it. Then I had to make a second model to make another modifier to change the area above it to all solid infill so that it would print somewhat correctly. ### Actual results This is with the modifier only on the bridge layer. You can see it prints SPARSE INFILL directly above the bridge and it starts the sparse infill at Z height 4.7 when it should be 5.5. It prints ONLY THE BRIDGE LAYER as the bottom shell! ![Image](https://github.com/user-attachments/assets/eca45916-7d45-49a9-936e-a19553bad42b) ### Expected results Here is how it SHOULD slice. Once above the modifier, it should slice normally and complete the bottom shell. ![Image](https://github.com/user-attachments/assets/2205f8c9-62d1-422d-ae44-47caba1a3079) ### Project file & Debug log uploads No debugging files generated. This is another slicing error just like the internal overhangs that I haven't heard a word about! The sad thing is, ALL SLICERS do this! ### Checklist of files to include - [ ] Log file - [ ] Project file ### Anything else? It's very disappointing that there isn't an option for another slicer that doesn't contain these bugs!

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Reference: github/OrcaSlicer#1844