You will not get the same result in UE4 like in MGS 5, not even near. The “old” cryengine GI system used the same technique, it’s the same what Ubisoft does with The Divison.
ARK did basically the same on a lower level, they had do develope a probe based lighting system for they’re game to get some GI and indirect lighting.
What i’m trying to say is, GI and indirect lighting are a huge task, it’s not easy to develope something that is production ready for games. I mean this is the reason why we don’t have it in UE4,
there is one twitch stream with epic, where there answered a few question from the chat, one guy asked about dynamic lighting and GI “not lightmass” they simply answered that they don’t have the resorces “man power”
to develope it, cause it will take a lot of time and there are other points that are more important at the moment.
Here is what enlighten is doing… it’s simply a hard task.
http://www.geomerics.com/wp-content/uploads/2014/03/Unite-Europe-deck-with-notes.pdf