London-based artist Jonty Hurwitz creates sculptures that challenge our perception of reality. At first, they just look like pieces of metal, twisted around a cylindrical mirror.

But if you look in the mirror itself, you’ll see that the objects’ reflections appear more familiar. These intricate designs transform to reveal things like a hand, a head, or a frog.

Hurwitz scans objects before digitally manipulating them and fabricating a sculpture. For his artworks, which are a study on the physics of how we perceive space, he has worked with perspex, steel, resin, copper, and acrylic. He writes:

Each piece is the stroke of over 1 billion calculations and draws upon a unique way in which our brains interpret the spacial information they receive. I usually start by expressing a concept using mathematical tools, often involving billions of calculations and many months of preparation. I then explore ways to manifest these formulae in the physical world. Each piece is both an engineering and artistic challenge.

Click through to see a selection of Hurwitz’s mind-bending sculptures:

Jonty Hurwitz