Situation: I am reading a book on the chair with a chair on my left and a chair on my right.
Alternative situations: I am sitting on an armchair while looking at the two pictures that are above the couch that is behind the coffee table in front of me. Sitting in the armchair, I notice that the picture above the couch in front of me is not straight.
Question: Is the door in my 2 o'clock direction transparent or solid?