Hi, i'm new around here.
Title is self-explanatory.
I need something that blocks player but let bullets and nades through. i thought I could use func_illusionary and use the texture I wanted and then put a func_wall of nodraw and selecting "do not render" in Render Mode Option. But bullets disappear instead of going through.

any help would be appreciated ^^

I answered myself with testing ^^
If you want to make a brush where only bullets and grenades can go to but still block the player you need 2 brushes :

1 brush with the texture you want ( I took the combine force field) and tie the brush to a func_illusionnary

second brush is the player blocking brush. You simple need to texture it with "player clip" texture and tie it to a func_wall. Render Mode = Texture and FX amount = 0

et voila! you have a brush letting only bullets and nades through ^^

if you dont want the blocking volume to move you dont have to tie it to an entity, (i think it saves memory if you dont tie is, but im not sure about that)