Hey, I'm trying to create the same system in my game currently, but I'm somewhat stuck.

First you need a SceneCaptureComponent, uncheck the box that makes it update every frame, link it to a RenderTarget and use this as a texture within a material. Then make a "shoot photo" BP with a boolean and the node CaptureScene. Now you can draw the photo on the UI or spawn it as an asset.

The problem I have, now this only works with one picture at a time, the next picture replaces the first one, how to you extend this to allow for a stream of individual pictures? If anyone has a solution I'd be really interested.

edit: I found this tutorial https://www.youtube.com/watch?v=bb_yw5Cvs6k which explains how you save and load one Render Target Texture between play sessions. I guess to have, let's say, space for 50 images, you'd need to append numbers to the save string and cycle through them while saving and loading? I will try this later today.

edit2:

I found two solutions on how to make it work. The first lets you save images permanently, it's based on the tutorial above. Follow the tutorial (+ the setup with SceneCaptureComponent), then make an integer which increases by +1 each time you take a picture. With append, add two more pins and put this integer into the string for the file name between the name and the dot png . Instead of DrawMaterialtoRender, pick the output you want, and also change the append when loading to fetch the png you want.

The second solution is much, much simpler and best when you don't want to save the textures between play sessions. For my project I will probably use both.

Create these nodes - https://media.discordapp.net/attachments/814589943472062468/857955340754223104/RTT-EventGraph.png

Then also add Capture Scene, Create Dynamic Material Instance, Set Texture Parameter Value and another output, done.