It is not being addressed in Corona 10, sorry - you can see the items planned for 10 in
https://trello.com/b/EfPE4kPx/corona-tentative-road-map-3ds-max . From our side, this is a pretty niche situation that wouldn't occur often as it doesn't really represent any set up in the real world (if a light was inside a blue sphere, the sphere would be hollow and the light would not be inside the glass media but outside it still).