Google's Project Tango: 3D mapping on a smartphone
3 March 2014 Last updated at 09:05 GMT
Google has unveiled a prototype smartphone fitted with 3D sensors as part of its Project Tango - which aims to give mobile devices a human-scale understanding of space and motion.
The phone emits pulses of infrared light and records how it is reflected back allowing it to build a detailed depth map of the surrounding space.
BBC Click's Spencer Kelly reports.