Think about it.....how many screens have you got ???
When the game goes FULL SCREEN ...where do you think the other would go ?
All the best Brett
I don't think you really grasped what I was trying to ask.
I ended up just testing it real quick. Selected two pictures and set the timer to 5 minutes. Hit save changes and and launched a game. Waited 6 minutes and exited game. Background image A had indeed changed to Background image B. So it seems the background wallpapers do change during full screen applications.