The architects Claesson Koivisto Rune wanted the facade of the building to speak to the traditional Japanese rice paper screens, whereby diffuse light migrates deep into the building. According to the architects, the pattern for the facade was designed around the leaves of a cherry tree.
I came across this building recently and fell in love with the intricate design and detailing of the titanium metal panels. To me, the screen resembles a modern interpretation of the ornamental detailing done by American architect Louis Sullivan or French architect Hector Guimard. One of the most powerful elements of the building is how its monolithic facade dematerializes when backlit at night.
For more about architectural ornamentation read Re-sampling Ornament: Swiss Architecture Museum in Basel