For the new bathroom in the basement I decided to add a little bit of architecture to the ceiling, inspired by coffered ceilings. I used a bunch of salvaged doors from our local Resource Store for a few bucks a piece and painted them the same dark blue as the actual doors in the basement. I then screwed and glued them to the joists. Caulked the seams and screw heads (inset heads) and touched them up with the blue paints. I didn't fill or sand the the doors completely so they kept some of their salvaged charm. All the doors are facing the same direction, but staggered to keep the most interesting details in the space. I ended up with only one full door in the room, in which I reinstalled the old door handle.
Most people don't notice my secret passage. I like to think it is only exists for those who truly believe.