I had this only on very few occasions, where a restart of FreeCAD fixed it. In case it has something to do with report view, here are my settings: It is 100% reproducable for me. Your report view settings were almost the same as mine. Changing to yours had no effect. If it's reliably reproducible c...

If I start FreeCAD and then click Tools|Customize from the menu, it SEGfaults. Can you somehow get a callstack to see where it crashes? 0.21.2 now also segfaults! How old is your 0.21? Have you observed this crash earlier or did this happen all the sudden? Do you use a self-compiled version or one ...

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Just have a look at: https://github.com/looooo/freecad.gears/tree/4e6223bffa44c2cd66b5047b9b0d8bbe9bbd9a3e License GNU General Public License v3.0 and: https://github.com/shaise/FreeCAD_FastenersWB/tree/def9cfed22398336973ef41e291561e06eb5c155 License GPLv2 which renders irrelevant any further discu...

the property wont appear under "Animation". The property is created though, because when I do:

This is because there is currently no property editor implemented.

https://github.com/FreeCAD/FreeCAD/pull/13332 is now finished. It fixes all issues I have observed.

I have prepared a PR that demonstrates all the observed regressions: https://github.com/FreeCAD/FreeCAD/pull/13372
With this PR the issues are fixed. However, there is now a failing unit test that has passed before.

Now transparency goes from 0-100, as before. But also FreeCAD support the alpha channel. Would it not make sense, to use this explicit channel? We already do use it here and there. But currently it doesn't work very well to define colors and alpha value per face. It must be checked if it's a genera...

Es ist nicht unüblich, bei einem Materialhandler auch Farbe zuzuweisen. Oft sind es Signalfarben. Man könnte es ja so gestalten, dass einem Objekt zugewiesenes Material zunächst eine bestimmte Standardfarbe setzt, falls diese dort definiert ist. Danach sollte der Anwender aber die Möglichkeit haben...

Wenn ich das richtig verstehe, dann bleiben die Werte auch bestehen wenn man einen Body um neue Features ergänzt? Das wäre noch zu testen. Und wird das in Part auch durch den ganzen "CSG-Baum" durchgereicht? Die allermeisten Funktionen in der Part-Workbench reichen ihre Farbinformationen ...