Hey dose any 1 know why my worlds dont work when 1 added a mod using minecraft modder i think its called but still dose any 1 know plz plz plz answer me and its not that i have mod loader coz there mods that dont need mod loader so yeah if u know whats happend jus say but i what happends is it shows the dirt back ground then it gos black so help me plz i will thank u in advance.