Charles Stinson Architects
These white concrete panels measure approximately 1 meter square. Charles Stinson drew a sketch of what he wanted, from which three small samples were made. He selected one with bands of concentric tonal change, and the full-size molds were then made. Note that when viewed from the below the panels have a dark perimeter and a bright middle.
When viewed from above, the panels now have a bright perimeter with a dark center. The change occurs as the viewer ascends or descends the stairwell. The difference is greater at night with more strongly directional lighting.