While it doesn’t have an actual photo mode the original Guild Wars had a function where, when you hit the Print Screen button, it would raise a bunch of your graphics settings for one frame and then immediately lower them again so that you’d get a screenshot that looked pretty good regardless of what your computer specs were. It’s a nice little feature that I wish more games would implement.
In Assassin’s Creed Odyssey (and I think Origins, and I assume Valhalla as well?) when you take a screenshot it uploads it to a server somewhere and will display it on the world map for you and for other people. So sometimes you can look around an area and see what pictures other people have taken and even click on them to leave a like.
A few of the Yakuza games have photomodes in the form of a camera on the Kiryu’s (or Ichiban’s) phone. It’s pretty barebones but what I do like is that NPCs react to you. So any story characters you have with you will strike a pose if they’re in frame and random civilians will look at you and occasionally photobomb you. It’s cute and helps make the world feel just a little bit more alive!
This is something that I feel like is a bit more adjacent to photomodes but thinking about screenshots reminded me of PS4’s “take a screenshot when you get at trophy” function which is a cool idea that has mostly resulted in pictures of load screens and menus. But I’ve gotten a few good ones including this shot from Yakuza Kiwami 2.
And one other thing that is also photo mode-adjacent is in Watch_Dogs 2 with the Scout X app. It gives you notable locations to go take selfies in front of and mostly rewards you with additional poses to do for selfies but the really clever thing is how it works as a way to get you exploring the world. WD2 doesn’t have towers like other Ubisoft open world games and icons are only revealed when you get near them. So, Scout X gets you travelling all over the place and will (probably) get a bunch of things marked on your map.
(I don’t have a good Watch Dogs 2 screenshot because the graphics options had to be turned all the way down so they look like dirt)