We've previously written about experiments in 3D printing for building construction and while these experiments have experienced varying degrees of success, there remains the question of "what do you print" if you can build house-sized objects.
That was the question answered by design firm Softkill, whose exhibit at the recent 3D Printshow displayed a structure they call "Protohouse". It's design is organic, emerging from a mathematical algorithm that examines stress and geometry to arrive at a rather unique and apparently functional design. The algorithm is similar to human bone growth, no doubt due to the common requirement for stress relief.
Much more at the links below.