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Import 3MF & STEP preview don't print display coloured parts if extruded inside #8984

@jomixlaf

Description

@jomixlaf

Bambu Studio Version

2.4.0.70

Where is the application from?

Bambu Lab github releases

OS version

Mac OS 26.1 Tahoe

Additional system information

Macbook pro M1 Max

Printer

H2D

Printer Firmware Version

latest

How to reproduce

I have a bunch of files with text inside the 3d parts, they have not been extruded, they are simply separate components to allow me to assign a specific colour. In the prepare tab, the view is correct, I can see my text inside the parts, I can even see the purge tower, but when I press slice, in the preview, my text is gone as well as the purge tower, it's all the same colour.

This has been a difficult bug to chase because it sometimes works and sometimes doesn't, and I don't know what makes it behave this way. What I do know is the following. If I extrude outside my text, the file slices correctly. But I don't want that because I need the text to be face down on the built plate.

So I discovered a workaround a while back. If I change my text type to negative part in Bambu, I sliced, then I revert to normal part, then the colour slice is working correctly. This is beyond time-consuming with multiple files and variants. I must do it every time I import.

I made a video on YouTube to better explain this.

Actual results

STEP file is in the ZIP below

Expected results

Thank you.

Project file & Debug log uploads

NameTag_XLR_OUTPUT_1.step.zip

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  • Log file
  • Project file

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