How to disable image rendering?

Question

unreal engine

Good day
The task is the following
There is a Steam game that runs on the Unreal Engine 4 graphics engine
I need to somehow disable graphics rendering for this game
That is, as a result there should be a black game window and a video card that is given the minimum possible load
There are ideas how is it possible to achieve this effect?
The only way that comes to my mind is to inject into a running program, find the place where the data is sent for rendering and simply replace this place with some kind of stub

Answer 1

If the game itself does not provide for a headless mode, then you will have to reverse engineer
Aka to read the binaries and understand if this is even possible