Well it would be neat if there was an X-ray vision FX spray where you could make bricks appear invisible when viewed through a transparent brick. One good thing about this mistake is that you could make interesting builds that show hidden areas. Still annoys me when I don't want certain bricks to appear invisible though.
Actually, Tony, I think there are FX, if used on transparent bricks, will revert them to the old lighting system, allowing you to still see the other FX through the transparent brick.
I think Chrisbot6 knows what they are. Maybe it was pearl... I don't remember.