Portal: Prelude Forum

In Chamber 4 (with the stairway to the bottom), I am having trouble completing the level because of my own stupidity.    Anyways, when trying to get through the level, I noticed that if you (at the top level) face the door across the chasm that your portal gun will light up like you can fire.  Fire a portal at that point (it should be at the edge of the circular door, bottom right) and it will go through the door and contact a wall behind the door.  You can then fire another portal anywhere else and get across the chasm and to the next level!

I doubt this was intentional (since firing a portal through a door is not exactly a normal action) and so thus I report it as a bug.  I'm sorry if it is the intended solution for the level!

Additionally, the door will not open if I approach from the wrong side, it remains closed.

Now, let me see if I can actually just get across the chasm the right way now...