How to bend the corners of a square lattice bookshelf?

This kind of thing is usually processed in a furniture factory, so it is difficult to make it on the spot, and even if it is made, the effect will not be good. Furniture factory has all kinds of equipment, and there are many ways to open this arc, which is generally made of MDF.

On your drawing, not only the inner circle, but also the outer circle is difficult to make, and manual planing on site is both labor-consuming and bad!

The inner ring is simpler than the outer ring. You can find a painter to do it, fill it with right-angle putty (gypsum is also acceptable), mold an arc with a cylinder, and then coat it with a matte finish after drying, which should have a similar effect!