Konstruct, a new free iPhone app from London-based AR-developer James Alliban, makes creating virtual sculptures as easy as speaking into the phone. The app uses an existing vision tracking system in combination with a printable marker -- a piece of paper with a specific pattern that the software recognizes. You put the marker wherever you want the sculpture to exist, start the app, then speak into your phone's microphone to create 3D objects in the scene. There are different settings for color schemes and shapes. As long as the marker is onscreen, the app allows the user to keep refining the sculpture.
It's not the only AR art app available. If graffiti is more your style, TagDis allows you to become a virtual Banksy, and for those into freehand drawing, the forthcoming Scrawl might be your thing.
"The idea of transforming entire cities into user generated virtual art galleries really appeals to me," says Alliban. "I see Konstruct as an early prototype that will hopefully be realised in this form in the future."
(via http://www.newscientist.com/blogs/onepercent/2011/04/new-augmented-reality-app-unle.html )