[Bug]: KDE fade animations aren't quite rendered properly

[DoomTay]

Version

7.2.6

Host OS Type

Windows

Host OS name + version

Windows 11 Build 26200.8246

Host Architecture

x86

Guest OS Type

Linux

Guest Architecture

x86

Guest OS name + version

Arch Linux

Component

3D Support

What happened?

Any fading animations don't quite render blurred transparency fading in and out. The blur doesn't come up until the fade animation is done. This is most apparent when setting KDE's animations to be as slow as possible. This happens in both X11 and Wayland, even with guest additions.

VBox.log

VBoxHardening.log

How can we reproduce this?

• Install Arch Linux
• Enable 3D Acceleration
• Set video memory to 256 MB
• Observe animations from opening the start menu, or clicking "Restart" or "Shut down" and watch as the background transition comes in.

Did you upload all of your necessary log files, screenshots, etc.?

• Yes, I've uploaded all pertinent files to this issue.