845a8e7d_ption___MuOnline_Pentium_Tools__Why_to_edit_
[File Location] \Data\World##\ [File Name] *.att [Description] In that file are where player allowed to walk, where it is a safe zone, or where player will see just nothing(black ground) [Why to edit?] 
Changing where player allowed to go or where is safe zone.
MuOnline Files Description - MuOnline Pentium Tools
Why to edit?