I'm wondering, is it possible to change at what distance from for example a weapon (spawned weapon, not dropped by a player) or an ammo box the "pick up" icon is triggered to appear?

I'm also wondering if this is possible to affect at all through LUA scripting on a server. I tried with SetTriggerBBox() but that didn't seem to do anything, and from what I understand from the wiki here it's supposed to just add a new area box for whatever purpose you want to use it for.

The applications for it is simply that I want to make people have to be closer to guns to pick them up. I find it very unrealistic that the player can stand on something 2 shipping containers high, and pick up a weapon near the ground from up there. I'd like to shorten this distance for some specific level design situations, but maybe it's hardcoded into the game and unchangable?

variable: g_playerInteractorRadius
type: float
current: 2
help: Maximum radius at which player can interact with other entities

Wow, thanks I didn't know there was such a variable. This must be exactly what I'm looking for.

However, I can't seem to change the value. Trying to update it in the console window only states that it is set to =2, and trying to put it in server.cfg doesn't seem to change it either.

Do you know how to change the default value for it?

You must run game with -devmode parameter (all variables are enabled) or put in your
\...\Crytek\Crysis\Game\Config\diff_normal.cfg
It will work for singleplayer and multiplayer (only your own non-dedicated server)