[Needs a rewrite. -Ed.]

While displaying the worlds keep a counter of the next object group to display, counting from SPT3 to SPT0 as you display an OBJ group decrement the counter. OBJ groups ignore the MX, MY, MP, and GX, GY, GP values, and just display the whole 512×512 image starting at screen coordinates 0,0. Otherwise OBJ's are the same as normal BGMap's. Only four Worlds may contain an OBJ collection at any given time.