Modifiers can't set wall thickness to 0

[cwale]

Bambu Studio Version

1.8.2.56

Where is the application from?

Bambu Lab Official website

OS version

Windows 11

Additional system information

No response

Printer

Bambu X1C

How to reproduce

I had originally posted a comment on this thread, but since it is closed I assume this should be a bug report instead.

A multibody STL is imported, with some of the bodies representing desired 'modifiers'. The modifiers are set to change the wall thickness of the main part, but instead they act only as 'negative parts' and not 'modifiers'.

Actual results

Preparation settings:

Sliced result:

Expected results

It is expected that within the modified regions that the wall thickness is 0, i.e. you should be able to see internal infill.

Project file & Debug log uploads

Modifier Wall Loop Bug.zip

No crashing so no log file provided.

Checklist of files to include

• Log file
• Project file