Is there an existing issue for this?

• I have searched the existing issues

Problem description

When exporting attached file to IFC format, doors and window frames are transparent. I am able to reproduce the issue only with 1.1dev version. 1.0 exports doors and windows well.

The exported IFC file was tested in two IFC viewers - BIMvision and BonsaiBIM.

Export from 1.1:

Export from 1.0:

The file, including IFC export:

FC-transaprent-doors.zip

Full version info

OS: Windows 10 build 19045
Architecture: x86_64
Version: 1.1.0dev.39896 (Git) Conda
Build type: Release
Branch: main
Hash: a977fade2de741c94c9efa59b1c2c26df18eb631
Python 3.11.11, Qt 5.15.15, Coin 4.0.3, Vtk 9.3.0, OCC 7.8.1
Locale: English/United States (en_US)
Stylesheet/Theme/QtStyle: FreeCAD Light.qss/FreeCAD Light/Fusion

Subproject(s) affected?

BIM

Anything else?

Might be related to #18655 - this one is not about IFC export though.

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