Beech shoji with a SW Fruitwood stain on the frames with Port Orford Cedar Kumiko in our Fibonacci sequence kumiko pattern.
The overall pattern is a Fibonacci series (1,1,2,3,5,8 ...), and various sections of the pattern show Golden Rectangles (1-1.618), squares and various other pleasing geometric proportions.
Yes, we actually think about this while laying out a kumiko screen design!
Shoji kumiko detail.