[Ben Bartlett] recently got engaged, and the proposal had a unique bit of help in the form of a 3D-printed hexagonal mirror array, whose mirrors are angled just right to spell out a message with th… ...

This is the actual 3D printable hexagonal mirror array created by Mr. Bartlett. There are three materials: 1 inch (about 2.54 cm) hexagonal mirror tile, PLA filament used in 3D printers, and adhesive.

The gleaming hexagonal mirrors are reminiscent of the James Webb Space Telescope. Another gotcha was when [Ben] suddenly realized, twenty hours into printing the final assembly, that the message ...

Each of the 18 pieces which make up the huge mirror help to shape the way the light is reflected. Plus, Webb’s hexagonal mirror is actually made up of a series of smaller mirrors — which have ...