Blending previous frames renders in blueprint

Development Rendering
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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,

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

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NOT an answer: BUT…

I want the same effect, I got around it by using motion blur,
2 frame targets, with a maximum of 100,
while it SORT of does what i want, its not quite what. (i think) we BOTH want.

So i’ll be BUMPING this!!

i think we need to do a scene capture, blend and then output again but … i have no idea how to do this yet