The regression is caused by 6624fa3775ae . For a build it copies the file materials-editor.ui to Mod/Material/Resources/ui of the build directory while after running the install target the file is still under Mod/Material. MaterialEditor.py has been adjusted to load the ui file from the new location...

Die meiste Zeit geht beim Neuberechnen der Features drauf und nicht so sehr mit der Tessellierung. Testweise habe ich einmal alle Features und einmal ein Feature mitsamt Abhängigkeiten neu berechnen lassen und das Ganze mit und ohne GUI. Alle Features neu berechnen: import time doc = App.ActiveDocum...

OK, but for developers the central place to look for new feature requests or bug reports is the issue tracker and not the forum.

How did you create this mirror plane reference?

Found a way. If the mirror plane is set with property editor then the whole datum plane is set and then it fails. I will open a feature request for it...

OK, I found out what's different: If you load the project and check the mirror plane with App.ActiveDocument.Mirrored.MirrorPlane it says (<Part::PartFeature>, []) If you redefine the mirror plane and check it again then it says: (<Part::PartFeature>, ['']) How did you create this mirror plane refer...

No idea what's wrong. If I load your project and do a recompute an error is raised that it fails. But if I redefine the mirror plane then it works.

installation via apt using the FreeCAD repo with: The question is why the PPA version uses a newer version than the Ubuntu 22.04 standard package. Maybe you should discuss this with kkremitzki . On my system I also use the standard OCCT package and this is totally fine. Ubuntu 22.04 requires Fuse3 ...

Kann man das auch ohne Google-Konto herunterladen?

You only have to run it when a new sub module was added. It doesn't happen very often.