Invisible items glitch

With the update of Z-Buffering on 15 September 2010, items would sometimes appear underneith the floor, in certain locations, such as the tunnels where armoured zombies are found. This prevented players from seeing the items on the ground, but the items could still be picked up by clicking where they should be.

This is caused by the ground being rendered over top the items. This has since been fixed by Jagex.