There are elements of Bec Dowie’s northern New Zealand home that are impossible to capture in photographs alone. One may not realize, for instance, the scope of its rural surroundings. It may be hard to detect the relative quiet in comparison to the city where the designer, her husband, and daughter previously made their home. And it most certainly may be difficult to grasp that, despite a noticeable lack of embellishment, it’s a multifaceted — and completely modifiable — space that belies its minimal appearance. To put it plainly: Its walls move.