How to block something from going somewhere

From Valve Developer Community

Ever make a map, and you dont want a team or a player to go to a certain area, but you want them to see the area? Or make it seem like no wall is there? It's very easy to do that. Make an invisible wall.

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Steps

  1. Create a brush. Any size at all.
  2. Place it at the site where you dont want a character to move.
  3. Add the texture: vgui/screens/transparent to it.

Congrats, you're done. Now if a player tries to go through that area, he will be blocked. But he can still see it. It's justa n invisible wall.

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