Something Like A Clip Brush, But Not Exactly

[metal_head]

In a lot of games, on some places, there are invisible walls, which stop you from going somewhere, the player can't get through them, but the projectiles he shoots don't make a collision with the invisible wall. I need to make something like this for a part of my Sci Fi city level, where you have to walk on a platform in the air (which flies using jets). I want the player to be able to shoot the enemies, which are on the buildings, but if I surround the platform with clip brushes, the projectiles hit the clip brushes and get destroyed. I need to make something that will keep the payer from falling and in the same time, let the projectiles go through it. Is there a way?

[Zidane]

You must use a transparent StatichMesh

[metal_head]

oh...how haven't I though of it , sooo that's the only way, right?

[Zidane]

I think that it is the only way. Actors collide with teh staticmesh but royectiles not collide

[metal_head]

Thanks, I didn't thing of tht one, I kne that, but never though I can use it for that, thanks!