The current default hitboxes use an extra and useless (in my opinion) entity. I think it might help large servers getting less resources load if every single player didn't have an extra hitbox entity which is used only for prone anyway. Some screenies I took on hitbox debug mode: silEnT: http://obrazki.elektroda.net/80_1343128582.png (the green square, that's the entity I think is useless) ETPro 3.2.6: http://obrazki.elektroda.pl/3008012900_1368028727.png (stand) http://obrazki.elektroda.pl/7439379200_1368028728.png (crouch) http://obrazki.elektroda.pl/2056486200_1368028729.png (prone) As you can see, in ETPro an extra box entity is added only to the prone animation, though I don't know which solution is better (current silEnT's one or ETPro's) when talking about performance, I just wanted to bring this interesting subject to the forums, I hope you guys (developers) know better than me which one is better .