Invisible players

Ive seen 2 invisible players today where i could only see there weapon,mouth, and eyes. Is this a glitch or are the hacking somehow? Ive also notice they turn props invisible when they walk by... This is very strange i have screenshots of 3 invisible players just incase this is some type of hacking

Pics





This player was suspicous because players were complaining about him and hes was running around with a cement block and things would dissapear after he passed them

Could be a texture bug? Although i've seen invisible players too, infact one of them was that idiot that spammed us all into the spawn, remember that?

The hard part of this is finding who is doing it. Though I know exactly how they did it and we've removed access to the tool used.