This project explores the invisible terrain of WiFi networks in urban spaces by light painting signal strength in long-exposure photographs. A four-metre long measuring rod with 80 points of light reveals cross-sections through WiFi networks using a photographic technique called light-painting. More here: http://www.nearfield.org/2011/02/wifi-light-painting http://yourban.no/2011/02/22/immaterials-light-painting-wifi/ Behind the scenes: http://yourban.no/2011/03/07/making-immaterials-light-painting-wifi/ Photos: http://www.flickr.com/photos/timo/sets/72157626020532597/ In case Vimeo has video problems, there is also a Youtube version here: http://www.youtube.com/watch?v=cxdjfOkPu-E