A separate page of simple tubular knots is here.
A badly edited version of the image marked † appeared in What Are You Looking At?, Carlton, 2005, and Fantastic Optical Illusions, Carlton, 2006. This pattern shows effects of the Hermann Grid.
The † image has also been used without my permission for the design of an LED lamp, as shown in the videos.
Creating an inner polyhedron from the polygonal mid-points leads to an infinite zoom alternating between pairs: Cube/Octahedron, Dodecahedron/Icosahedron, Tetrahedron/Tetrahedron.
An object formed from the perpendicular intersection of three coloured cylinders : seen in X, Y, Z, three angular views, and two animations.
A rhombic dodechedron (rather than the familiar type made from regular pentagons) : seen in X, Y, Z, three angular views, and two animations.
Any single ring can pass through the loop of any other, as a pair, but all three remain as a knot : seen in X, Y, Z, and one angular view.
The rectangular version interlocks in such a way as to resemble a Chinese wooden puzzle, though in this case there is no solution.