Urban Alliance, a media architecture collective, recently unveiled the Moodwall, an eighty foot interactive LED installation that mimics the actions of passing objects or people.  Sensors pick up on moving objects and project an “infrared-like image” on the wallpaper made up of 2500 LEDs.  The lights are situated behind a ribbed semi-transparent wall which enable those outside of the tunnel from seeing the projections and make it less vulnerable to graffiti.
The goal is to create a space that greets pedestrians with a playful light while deterring crime in public spaces.  The project won a competition for ideas in unsafe areas [...]