If you look carefully at the window panes in the top right-hand corner of the closer tower at 2:37, you'll see them disappear (or just become less pronounced).
@martonszokor Well he would be because he is in a normal state of mind with his temporal lobe pieces re-connected. Waltenate is pretty much Walter from our side without the brain modifications because Walternate, unlike Walter, didn't make the choice of having pieces of his brain taken out.
If you look carefully at the window panes in the top right-hand corner of the closer tower at 2:37, you'll see them disappear (or just become less pronounced).