I like to know how to add Collision to my custom zombies
so I can shoot them bullets go right through them whether they're custom FX or normal guns
I even put surface Types on the materials no luck

i do this
https://prnt.sc/gx6fez

get this error
my model has no errors on no Mash in maya
https://prnt.sc/gx69dg

In the hitbox spot you can put
anim_dependancies\base_character\base_character.xmodel_export

In the hitbox spot you can put
anim_dependancies\base_character\base_character.xmodel_export

   + 1 work like a charm thank you now I got to figure out why my zombies don't Ragdoll after they die
and I added proper note tracks to death animation

There should be an error about missing notetracks in the console when they die. If not you could try moving just the death versions of your guys level.scr_anim stuff right after zombiemode::main(); in your mapname.gsc
If that doesn't work I have used something like this before.
Add this after the ai spawns or around where you set the health for that specific AI in gsc

self.deathfunction = ::allmodsdeathfunction;

Then make a function in the same script

allmodsdeathfunction()
{
iprintln("allmodsdeathfunction running");
self animscripts\shared::dropallaiweapons();
self startragdoll();
wait .5;
return;
}

Or

allmodsdeathfunction()
{
iprintln("allmodsdeathfunction running");
self setflaggedanimknoball ("deathanim", %rpg_stand_death_stagger, %root, 1, 0.05, 1);
self animscripts\shared::donotetracks("deathanim");
self animscripts\shared::dropallaiweapons();
return;
}

There should be an error about missing notetracks in the console when they die. If not you could try moving just the death versions of your guys level.scr_anim stuff right after zombiemode::main(); in your mapname.gsc
If that doesn't work I have used something like this before.
Add this after the ai spawns or around where you set the health for that specific AI in gsc

self.deathfunction = ::allmodsdeathfunction;

Then make a function in the same

allmodsdeathfunction()
{
iprintln("allmodsdeathfunction running");
self animscripts\shared::dropallaiweapons();
self startragdoll();
wait .5;
return;
}

Or

allmodsdeathfunction()
{
iprintln("allmodsdeathfunction running");
self setflaggedanimknoball ("deathanim", %rpg_stand_death_stagger, %root, 1, 0.05, 1);
self animscripts\shared::donotetracks("deathanim");
self animscripts\shared::dropallaiweapons();
return;
}

ty that fixed it you the best +1