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Immaterials: light painting WiFi

Immaterials is a interactive piece created by Timo Arnall, Jørn Knutsen and Einar Sneve Martinussen.

This project explores the invisible terrain of WiFi networks in urban spaces by light painting signal strength in long-exposure photographs. A four-metre tall measuring rod with 80 points of light reveals cross-sections through WiFi networks using a photographic technique called light-painting.