Using a clever mix of 3D printing and a few well-placed shadows, this sundial designed by Mojoptix projects the actual time as if displayed on a digital clock. The plastic component that casts the shadow—called a gnomon— is printed with extremely tiny holes that create pinpoint dots of light in the form of digits as the sun shines through during the day. https://www.thisiscolossal.com/2016/02/a-3d-printed-sundial-displays-time-like-a-digital-clock/