"We are pleased to unveil the first 3D printed home, made of.... bio-stuff," Mills joked, as a large black cover was lifted, revealing the one-story house."This was printed at 90 degrees, so from the back of the house to the front of the house is a series of lines going along the roof and down the wall, about a quarter of an inch apart," Tomlinson said from the living room."There's 1.2 million tons of wood residuals in our sawmills right now in the region that could go to print housing," Habib Dagher, executive director of the university's Advanced Structures and Composites Center, told the crowd gathered inside the large lab space.Dagher said the material presents a potential business opportunity for Maine's forest products industry, and it could serve as an inexpensive, renewable and recyclable building material.But Dan Brennan, executive director of MaineHousing, says this project could achieve what's previously alluded the state so far — speed."