Example: If player1 has sv.use.level3 and player2 has sv.see.level3 then player2 can see player1 even if player1 is vanished, however if player1 has sv.use.level4 then player2 cant see him if he's vanished unless he has sv.see.level4 or higher
For example, you can use this feature to let nobody but the owner see admins but admins can still see mods and mods can see each other
sv.use and sv.see without any level still work and both are level 1
Players with sv.* and/or supervanish.* have access to sv.use.level1 and sv.see.level1 by default
Opped players or players with * perm have access to sv.see.level100 and sv.use.level100 and can therefore see any player and can not be seen by any player who hasn't got sv.see.level100