This video guide will show you the locations for all the secret mural paintings in Ghost of Yotei. All of these are based on games that were developed by Sucker Punch in the past.
Refer to the video, with time stamps, below:
0:00 Cole MacGrath (inFamous 2) Mural
1:31 Sir Raleigh (Sly Cooper) Mural
3:50 Delsin (inFamous Second Son) Mural
4:50 Sly Cooper and Carmelita Fox Mural
6:04 Rocket: Robot on Wheels Mural
9:15 Abigail “Fetch” Walker (inFamous First Light) Mural