I've heard there are places in Portal 2 where it is possible to place a portal on a moving surface without the portal disappearing? What chamber is this in, and is it possible that I played through it, or is it a required mechanism of the game?

  • 1
    It was demonstrated on YouTube that this is possible using sv_allow_mobile_portals.
    – Keaanu
    Apr 28, 2011 at 14:54
  • I think they didn't want players to interact directly with moving portals. The people behind Portal 2 know what they are doing and if moving portals were a good idea they would probably have already used them in Portal 2.
    – Hilydrow
    Apr 29, 2011 at 3:15

1 Answer 1


Chapter 5 - Area 3

When you have to cut the tubes of the neurotoxin generator.

But I think it's the only place in the game. Correct me if I'm wrong!

  • @Juan Manuel: Thank you! I was looking for that functionality.
    – Hilydrow
    Apr 28, 2011 at 14:53
  • 2
    +1 simply for the invisible text. How DID you find that out? May 1, 2011 at 20:33
  • Found out what? The invisible text? It's because of Juan's edit. You have to put >! before the text you want to hide.
    – Hilydrow
    May 2, 2011 at 22:54

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