Its amazing to see youre working on a so requested feature from the community.
I’m here for a few months already and only yesterday bought a computer that was enough to run it - I stayed all this time waiting to run Unreal instead other engines mainly because this contact we can have with developers, this is really !!!
Please keep sharing the progress and explanations, I remember when was said that the Distance Fields could be used by GI but had no idea of how this could be implemented or if it would be able to run on production, after your explanation and screenshots I’m much more confident about it 
Thank you for the hard work!
Kind Regards.