it isn't a bonus disk it's an OEM, part of the full game to get you hooked so you buy it.
as for cell shadeing, ehh.... yes it is technicly in there, BUT, it only works in non-HTL mode, and non-HTL mode is
A) buggy,
B) extreemly slow,
and C) probly going to lose suport for it all together, sooner or later (there are no plans for this, don't freak out people)
as said it requiers additional art, and a small amount was made (for testing purposes) I had hoped that people woul start takeing it and makeing Robotech and Invader Zim mods, but no one ever did, wich is one of the reasons why we havn't reimplemented it in HTL mode
