When you take a picture using photomode or scapes, the three options that used to stay on the bottom of the screen (zoom, back and save) are not present anymore. They just appear of you hit any key (as long as it's not X or Circle - these will immediately trigger its functions). This is nice for taking screenshots using the Share button. Previously, you had a small time frame to press it before the options appeared on the bottom of the screen and stayed there.
And now, there's always a little GT logo on the bottom left corner of every picture. These always appeared in saved photos inside the game, but not in those made with the PS4's native screencap option (these have a copyright notice on the botttom right). If you make a screencap using the Share button on the controller, you'll get both GT logo and copyright notice.