Stain II is from the Dirty Geometry series which explores pattern and form in museum-quality fabrication by a facility used by Serra, Judd, Kapoor, and others. The piece explores the juxtaposition of stable form and turbulent pattern, between geometry and infinitesimal calculus, between Euclid and Leibniz. The only place where these ever meet in actuality is in a stain. Otherwise, they are historically juxtaposed as a mathematics of form and mathematics of event. The objective is to explore them in an autonomous sculpture that can also serve as a staging platform for other objects. As with Brâncuși, it is both a sculpture and a base. The mesh pattern, based on computational fluid dynamics and particle physics, is locked into the surface of the form. It anchors the perceptual field in that hollow between the fugitive detail of reflection and the black hollowness underlying the reflective webbing pattern.