Some people may not like the white dots on login screen of ubuntu 12.10, But i really love it , is there any way to add these dots desktop also and is there any way to remove these from the desktop(after addition of the dots in desktop)??
Just what you need, to add that 'dots' to picture you want, and after that just set that image as background image in login screen. To do that I have googled some links:
From second link I guess this way must work.
sudo xhost +SI:localuser:lightdm sudo su lightdm -s /bin/bash gsettings set com.canonical.unity-greeter draw-grid true
This will may work too.