Having used Ubuntu since 12.10 > 14.04 LTS I prefer a transparent greeter vs the default UM greeter. I posted both here and Ubuntu Forum and found a solution on Ubuntu Forum Here are the steps that worked for me:
re-install unity-greeter [computer had Ubuntu 16 installed with Mate desktop]
mkdir /etc/lightdm/lightdm.conf.d
create file 99_myconfig.conf containing
[Seat:*]
greeter-session=unity-greeter
sudo must be used to insure proper ownership
Upon reboot I was able to choose either Mate or Ubuntu and the greeter box was transparent.
I will try this on my laptop which has only Ubuntu Mate 16
@linuxuser701 If your question relates to the specific name of the background
/usr/share/backgrounds/warty-final-ubuntu.png
That is hard coded so you canβt change the name. To achieve placing your own image as background you can rename the images. I strongly suggest that your image is a .png. You may use gimp to change a jpg image to png by using the export feature.
sudo mv /usr/share/backgrounds/warty-final-ubuntu.png /usr/share/backgrounds/warty-final-ubuntu.png.org
sudo cp YOUR COMPLETE IMAGE NAME /usr/share/backgrounds/warty-final-ubuntu.png
sudo update-grub
Thanks Pete I will try this you hammer the right nail. I am going to wait until i can install 16.04 on my desktop. It will be my stable machine So i can fool around and break things on my laptop. It feels good to use linux i have messed things up a lot but it is my fault and can usually be fixed that and viruses on my previous os is why i switched to puppy first then ubuntu 9,04 and have used linux ever sense,