We should be able to see the ground when watching down riding a Happy Ghast

If the player watches down while riding a Happy Ghast, the Happy Ghast should get slightly transparent to let the player see the ground. This would not only help the player to really see where he’s flying, but rather help the player to manoeuvre a leashed boat from catching the mobs to land it. Cause right now it is impossible to see the boat, what makes a transport like that really difficult.