Blending previous frames renders in blueprint

Hello everyone,

I have been trying to figure out how to blend previous frames to create a new output in a post process material.

I would like to be able to have a custom frame buffer that has the previous averaged frames and blends it with the current. To be clear I do not want to create a ghost effect on a single object, I would like to have this to be for the entire scene.

The reason I am doing this is for multiple reasons. I would like to achieve a screen bleeding effect and also grab frames at lower than actual fps and lerp between them to get another effect ect.

I trawled the internet for hours to no avail and would appreciate help if anyone knew how to set something like this up inside of blueprints.

Thank you kindly,

I would also like to add that I will be running in a low resolution so memory isn’t critical.