Would it make sense that in the lore of Portal the reason everything looks different is because of the nanobot work crew. Maybe GLaDOS could have told Chell why the facility looks different. Here is my Idea for what she could have said about the changes "You may be wondering why this place looks different,well I told the nanobot work crew to change the technology just before you came face to face with me"
I made another account because this is my home account and that other account is my school labtop one
what are your thoughts on this?
would make sense i guess