I wanted a seamless boot from GRUB2 to the desktop.
So here is the default kubuntu-logo Plymouth splash screen with the stripes wallpaper instead of the usual gradient.
I also removed the gear from the logo as it looked odd with this wallpaper.
If you want to change the wallpaper, replace background.png with another wallpaper that matches your screen aspect ratio.
I've no idea how to take a preview image but it looks good!
How to install: -
1) Extract to /lib/plymouth/themes/
2) In a terminal paste: -
sudo update-alternatives --install /lib/plymouth/themes/default.plymouth default.plymouth /lib/plymouth/themes/kubuntu-logo-stripes/kubuntu-logo-stripes.plymouth 100
3) sudo update-alternatives --config default.plymouth
...and select the theme
4) sudo update-initramfs -u