I just checked 1.0.2: https://github.com/FreeCAD/FreeCAD/blob/1.0.2/src/Gui/Application.cpp#L2260-L2275
Turns out that patch is not (yet) picked to that release branch. So while #431206 will conflict with this PR in git, this indeed looks like the correct (long-ish) term fix. Thank you for looking into this! I'll do one last build and test, but looking good.

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/which-package-for-freecad/67961/9

Backport failed for release-25.05, because it was unable to cherry-pick the commit(s).

Please cherry-pick the changes locally and resolve any conflicts.

git fetch origin release-25.05
git worktree add -d .worktree/backport-434105-to-release-25.05 origin/release-25.05
cd .worktree/backport-434105-to-release-25.05
git switch --create backport-434105-to-release-25.05
git cherry-pick -x 3d0c9bbafc65260634b71a50bf8897d2ceab0090

25.05 doesn't have coin 4.0.4+ yet. If it does update, we'll need to backport this fix. If it had applied cleanly, i'd have just done it - it doesn't hurt on older coin3d. However, seeing as it would need a manual backport, i'll not bother for now until the coin backport is drafted.

Backport PRs:

• [Backport release-25.05] coin3d: 4.0.3 -> 4.0.5 #434326
• [Backport release-25.05] freecad: 1.0.1 -> 1.0.2, various fixes #434327

@LordGrimmauld
Im still having rendering issues with this branch

couple notes:

• the video doesn't play for me
• this was never meant to fix rendering issues. The issue fixed here was a hard crash.
• Rendering issues are a new bug. Open a dedicated issue report for that and i can maybe take a look. Be aware though rendering issues can be hardware/driver dependent, it is often not trivial to reproduce those.