Halos associated to mobj's outside the game world
Halos associated to mobj's outside the game world are
rendered when they shouldn't be.
To recreate this:
If you create a thing with zero gravity and set it up with
a halo. Place this thing in your map. Now lower/raise the
floor/ceiling so that it is above/below the height of the
THING. You'll notice that the Halo is still rendered even
though it's outside the game world.