Startup Matterport's just closed a round of investor funding to bring its 3D mapping camera and "interactive viewing platform" one step closer to commercial production. The company, founded in 2011 and backed by the likes of Qualcomm Ventures, aims to let consumers build virtual, cloud-based maps of their homes, offices or other sites of interest -- using a special camera rig -- for eventual viewing on laptops or tablets. It's an ambitious project that's managed to raise nearly $6 million in funding so far. But despite that investment, details o