“Ever wondered how the Wi-Fi signal varies around your house or workplace? Well, a new project by Luis Hernan combines signal strength sensing with light painting to show you just that.

As part of a project for his PhD in Architecture and Interaction Design, Hernan has createdwhat he calls a Kirlian device: it’s an instrument that senses the signal strength of Wi-Fi networks, and then translates the signals into color using LEDs. Using a long exposure, he can then lightpaint entire physical spaces—creating these beautiful images, which visualize how Wi-Fi shifts ann swirls within the walls of a building.”