switch (FEAT_TRAINS,SELF, maglevhopper_switch, [
  STORE_TEMP((getbits(extra_callback_info1, 8, 8) < 4 ? CB_FLAG_MORE_SPRITES  : 0) + PALETTE_USE_DEFAULT, 0x100),
  getbits(extra_callback_info1, 8, 8)
  ]){
  0: spritegroup_maglevhopper_wagon_layer;
  1: spritegroup_maglevhopper_cargo_layer;
  return spritegroup_maglevhopper_cargo_layer;
}