For example, lets say I have astarot wings that I wear on my Avatar and for fun I want to wear my Sparky outfit in the Costume. The astarot wings don't look good with Sparky (imho) so, if we had this "blank" back item I could equip it in the Costume Back slot. This would cause the astarot wings to disappear or turn invisible but still remain in the Avatar slot.
I hope I am making sense here.
Edited by TwiliteGarden, 03 April 2011 - 08:40 AM.