I changed my desktop background, but the login screen is still the road picture.For those who prefer to log in manually each time, the login screen has been redesigned to visually match the rest of the desktop; you now see the login box (known as the “greeter”) over your chosen desktop design, with a seamless transition from greeter to desktop.
Raspberry Pi3 running the 2016-09-23 Raspbian Jessie Pixel image, fully updated (sudo apt-get update && sudo apt-get dist-upgrade -y).
How do I change the login screen background?