is the main reason why it is being integrated into a separate branch of UE4 provided by NVIDIA. Before any of can be integrated into the engine released by Epic, it will need to either work on both GPU’s or use the CPU instead. Just wanted to clarify is not an official integration (at least not yet).
has mentioned they are working on alternate implementations of most of the features, but there is no news yet on how long that will take. I see no problem with them integrating 2 versions into UE4, one that uses an alternate method, and another that can be used with CUDA. It would be great if both versions were GPU based, but I am not sure if that will be possible.
That’s as much as I know at point, will be able to answer in further detail though, so keep an eye out for that. 