Transulency

MATERIAL QUALITY

One unexpected effect of the finished extrusions was that the polypropylene would be translucent.  This effect works in two ways.  The interior surfaces of the dome can be rendered in colors of adjacent surfaces.  If lit from the interior, the dome emits light.  This effect mimics the lantern atop Brunelleschi's dome, but through material quality, rather than fenestration.

In the double skin extrusions, light passes though the exterior surface, illuminating the cavity between skins.  The genius of construction of the layered skin and truss approach of Brunelleschi is highlighted, literally.