If I remember correctly translucent materials can only sample reflection coming fro SSR is recent version of UE4, or have no reflections at all in older versions. That's a limitation or UE4 unfortunately.
Sorry but I cross posted this in the UE forum Hey all, Having issues reproducing the result I get in SP2 in UE4. I'm unable to get the clear plastic look i'm going for, instead it looks ghostly and black where it should be greyish, it's also not reflecting any light. I don't think I'm using the opacity properly. I've…