What is this? No, it's not a cheese grater ....
It's one of these. None the wiser?
Well, it's a large metallic panel, about 2 feet square.
All the little cut-out circles are placed at different angles.
So you put lots of squares together, and then you get ......
A giant picture. Of clouds.
This is the outside covering to a new car park (parkade) where I work.