The exterior of the upper plate responds with different materials to the performative demands of their position on the building. The 26,000 square foot roof is a sedum covered green roof punctuated by a cluster of northern facing skylights which gradually increase in size towards the darker center of the plate further from the exterior façade. Two different types of sedum create a gradient pattern of dots that transition from articulated small circles near the manmade Arts Quad on the south to a dense, larger pattern of dots towards the natural landscape of the gorge on the north.