I'm making a car for my map. I don't know what kind of material to use for the windshield, but all I know is that I need something that the player can walk on, but you can still shoot through it. Anyone got any ideas?

special collision, or large collidable i think it's called. 'shader_name*'. Make that 'shader_name*%', so it's double sided. You'll also need 'shader_name!%' on duplicate faces, for render, since * is collision only

a Player clipping material would allow for collision with the player, but not projectiles or grenades, and it's automatically double sided,. The problem is that it's not rendered. You could make a playerclipping surface for collision, then have a seperate surface that is render only for the glass. I don't think tool would have problems. Are you planning on making an inside to the car that the player can see when they look in?

Yeah. And what I have it two polygons, facing opposite directions, that need this material.