Custom Buffer output into post process

HI DeleoDev.

it required adding a few lines to the source code and recompiling. It was rejected on github and I haven’t looked at it in a while. I heard that there was some change to the engine recently which allowed rendering code as plugins but I haven’t looked into it. I’ll have a look and see if its possible. In the meantime you are welcome to look at the pull request and get the code yourself if you want to compile it.

https://github.com/EpicGames/UnrealEngine/pull/2476