I created a thread with info on Distance Field GI + Heightfield GI in 4.8 here
https://forums.unrealengine/showthread.php?69307--state-of-Distance-Field-GI-in-4-8
I created a thread with info on Distance Field GI + Heightfield GI in 4.8 here
https://forums.unrealengine/showthread.php?69307--state-of-Distance-Field-GI-in-4-8