Look at this amazing interior designed by product design firm Nendo for a Tokyo mental health clinic. What appear to be doors are actually just wall paintings; doctors and patients enter and exit the rooms through sliding bookshelves and hidden openings in the wall.
Rather than getting patients back to a 'zero', a neutral starting place, the traditional model for mental health care, the clinic aims to provide patients with something extra: a further richness in their daily lives that they did not have before starting treatment. The interior design is an attempt to express this philosophy in space.