Woh ! That’s very nice.
About the shadows, I will soon test the distance shadowing. I heard tha it can be more performant in great exterior level and the blurred shadow are certainly beautiful !
I will see how the enemies shadows react.
I’ve been thinking at add some staticMesh in the enemy BP that react to the distance field in the opposite way : off inside, on outside the bubble.
Then, I can use this SM, visible only outside the bubble to make this “presence reminder”…
I will see 
Nevertheless, thank for your help