Hey Guys,
i know this may be a late post, but we actually solved this occlusion issue, its working for us thus far and the nebulas are not in the centre at all, ive done some testing with some opaque / translucent objects and had the same thing, Im happy to share what LeeFX and Schlabber assisted me in with and we got a workaround, been working on a different part of the game, so i just need to get all my ducks in a row, ill have a look and re-post the workaround, if you like?