X-Rays is a transformable pavilion that uses sliding and rotational movements along a pair of semi-circular arches to create varying experiences with light and shadow. Inspired by some of Professor Chuck Hoberman’s rotational sculptures, we wanted to create a human-scale architectural installation that transforms with sunlight during the day and allows for an interactive experience. X-Rays is composed of two sets of “arms.” Each “arm” is composed of a short and a long linkage supported by two arches hosting a rotational mechanism. The short linkages are fixed in position on the arch and rotate vertically and horizontally. The long linkages rotate and slide along the opposite arch. When fully open, the pavilion is accessible to adults from both of the arches. The inner space is tall and open as the short and long linkages are connected at almost a 90 degrees angle, casting a shadow far away from the ground. When fully closed, the pavilion is accessible from all directions. With the linkages stretching diagonally across the arches, the pavilion is just tall enough for adults to pass without bumping their heads. The space is intimate and immersive as the linkages are close enough to touch and provide a closely-knitted shadow. During rotation, the series of “arms” cross paths, filtering the rays of light and forming an X shape, hence the name.