Wallhax mod?

Uhh, just wondering, is there a way to "delete" a certain part of the 3D map so that the bullet would just go through?

I mean, the maps aren't server sided rite?

you could but i've tried "deleting" lots of the parts of the map file, all of which DC'd me or i just fell through the map and died and then got kicked

i know its possible though because i've seen it done before, i was in an online game and a guy i know for a fact doesn't hack was shootin me through the ground in snow valley