die falling from the map (like as_oilrig) ?!?!

[_Wraith_]

hey i'm doing a map in the sky, and i want it to add some "area", if the player would fall out from the game zone he would die! as in the map as_oilrig .. do you know?
can i do it with a giant brush below the map? how??

[Mr.Bob]

You can do it with the material tool "player clip" or "skybox". It is invisible in the map but is still a solid.