You don't read the captions do you? I made this the background because it is going to combine both Portal and Portal 2 like mechanics. Also, making it of one of PTTC's chambers would ruin the surprise. This is also the starting point of the mod, which the game will explain in itself.
Isn't this the regular Portal background?
not exatly...
no,some of the objects are different
Yes, it is
You don't read the captions do you? I made this the background because it is going to combine both Portal and Portal 2 like mechanics. Also, making it of one of PTTC's chambers would ruin the surprise. This is also the starting point of the mod, which the game will explain in itself.
I get it, it's half P1 half P2.
In TTC, you'll also learn how the walls are able to be like this, with both concrete and metal P2 walls. Its actually part of the 4 page storyline.