To solve the two room problem we're going to retcon that
Galatea
followed Winter and Langdon through the door and is with them now at the entrance to the new room.
As Langdon reached the end of the hallway he could see that through the doorway was an altogether stranger sight then what the mages had just seen. The room looked like a large open field, complete with thick real grass and what appeared to be the sky above and around them, or at least an illusion of it. About 20 feet away stood a large oak tree with a picnic table large enough for six people underneath it. Sitting at the table, facing the three mages, was Jasper, a smile on his face.
You can take this opportunity to do anything you want before talking to Jasper.