The thing I remember was that my friend's graphics card had a global transparency setting built in (AKA a wall-hack mode lol). You could see other players come into view as soon as the came into an area that was rendered. Then a CS patch came out and the players weren't visible until very shortly before they would become visible had we not had the uhh... transparency mode on haha.
Yeah that's the same deal as r_drawothermodels, crudely forcing the GPU to render objects that are behind other objects would give you a partial wallhack, but that wouldn't disable the engines occlusion culling so once it determined that an object was definitely no longer visible it would skip drawing it altogether, and you would stop seeing it through walls. "True" wallhacks were able to override the clients occlusion culling and reveal everything, so to defend against that the occlusion culling needs to happen on the server, which came much later.
The thing I remember was that my friend's graphics card had a global transparency setting built in (AKA a wall-hack mode lol). You could see other players come into view as soon as the came into an area that was rendered. Then a CS patch came out and the players weren't visible until very shortly before they would become visible had we not had the uhh... transparency mode on haha.