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A unicursal line is inlaid in copper on the face of a hollow truncated tetrahedron. The knot creates a cognitive visual illusion of three shapes versus two.
![](https://i0.wp.com/adamrowe.com/wp-content/uploads/2021p_20220329_174028998w.jpg?resize=524%2C700&ssl=1)
The illusion that there are sort of 3 shapes but only really 1 is something I like about this one.
![](https://i0.wp.com/adamrowe.com/wp-content/uploads/2021p_20211203_145142307_HDRw.jpg?resize=700%2C700&ssl=1)
![](https://i0.wp.com/adamrowe.com/wp-content/uploads/2021p_20211128_193623651w.jpg?resize=700%2C700&ssl=1)