Drilled folding-sliding metal panels in Paris by H&dM 
This is another case of drilled folding-sliding metal panels. It is very similar to , also by H&dM, but here the perforations are rectangular shaped, and smaller. However, the percentage of perforation is probably higher, around 50%.
The metal sheet is folded zigzag rather than corrugated; this difference changes a little the regularity of transparency from the inside.
The view of the outside through these panels is very complete, because the higher density of smaller perforations facilitates the work of the brain in reconstructing the entire image. It reminds us the image through a crochet curtain.
More info in:ArquiBlog 1rst part - 2nd part More photos of the building, by Margherita Spiluttini[see also case about wooden roller shutters on curve guides on the same building]