Im not sure if this is a dupe, but I think it would be really cool to have a chameleon circuit! The objects the TARDIS could turn into would only be objects with storage space inside (i.e, boxes, wardrobes, that sort of thing) and the doors inside would be a reflection of the doors or flaps outside. (The boxes would have to be big enough for you to fit inside) This could work really well for the other TARDIS (The one without bigger-on-the-inside doors) as you would not have to worry about the doors being animated and moving. I hope you will consider adding this in, please!