ArmaESP

Does anybody else know maybe ?

Can you pretty please tell me how ?

My question was is it possible and how to do it

Hello, ok so i play on an xX arma 2 epoch server, and there's a guy who (admins said) tweaks his in-game settings / graphic card settings or something which makes him not even render or barely render trees, whole server suspects him for WH, admins said it's not, they saw his video and he can more less look throught trees with tweaking some graphic settings. Since this forum probably has people who are dev's etc i'd try my luck here. Any ideas ?