Thank you guys for the info. It’s a sad day for us since we’re not really capable of merging nvidia / unity code into UE4 renderer or coding it ourselves 
And since we need it for 3 platforms then most of the plugins on marketplace are out of question as well. Guess we’ll have to roll with the post process GI, since that’s the only one in the engine then 
On the brighter side Screen space GI has been secretly released with 4.23, with a fully announced release planned with 4.24.
Is that approaching ray tracing for those of us w/out a $2000 gpu ? 