This event is fired to determine the visibility of a player, i.e., whether or not they are close enough to be noticed by an attacker. The result of this event is used to calculate (with modifiers from Vanilla Minecraft for sneaking, etc) the range a player can get to a creature before that creature sees them.

While this can be used to increase the visibility range (if it were decreased by Minecraft or another mod), it cannot be increased above its maximum value (the standard target distance).

You will need to cast the event in the function header as this class:
crafttweaker.event.PlayerVisibilityEvent
You can, of course, also import the class before and use that name then.

PlayerVisibilityEvent Events implement the following interfaces and are able to call all of their methods/getters/setters as well:

• IPlayerEvent

The following information can be retrieved/set during the event:

ZenGetter	ZenSetter	Type
ZenGetter visibility	ZenSetter ​	Type double
ZenGetter ​	ZenSetter modifyVisibility	Type See note.

This value cannot be directly set. Calling modifyVisibility with a double value will replace the modifier with the result of modifiy * double value.