During the Five Flushes of Fortune event in Genshin Impact, players will need to track down a different colored item each day and take photos of it using a Kamera given to them by Ji Tong in Liyue.
The Kamera is broken and only produces random photos of different colors, which can be traded to Ji Tong for rewards like Primogems, Hero’s Wit, Enhancement Ore, and Mora.
If you find yourself with lots of copies of one color or in need of another color, then you can trade photos with your fellow Traveler. Doing this is quite simple and will even net you some progress on your Season Pass.
All you need to do is open the events menu and then click on the prompted button for Photo Swap. You can see which button this is on your platform in the bottom left. This will bring up a list of your friends, and each one will have the five different colored photos beside them, along with a count of how many of each they have. Select the friend and the photo you wish to send, then hit the Confirm Gift button.
Unfortunately, there is no way to request specific photos, so if you are missing on particular color and could get another reward if you had it, you will need to send your friend a chat message, or just hope they are kind enough to spot what you need on their own.
There is also no limit to how many rewards you can claim in a single day, so even if you miss out one day, you can always grab two the following day if you get lucky with the colors from the Kamera.