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Fabricating Microgeometry for Custom Surface Reflectance
ACM Transactions on Graphics (Proc. SIGGRAPH), August 2009

Tim Weyrich, Pieter Peers, Wojciech Matusik,
Szymon Rusinkiewicz


From left: a user-designed highlight is converted to an optimized microfacet height field. A computer-controlled milling machine is used to manufacture the surface (30×30 facets, each approximately 1mm×1 mm), which exhibits the desired reflectance.

Abstract

We propose a system for manufacturing physical surfaces that, in aggregate, exhibit a desired surface appearance. Our system begins with a user specification of a BRDF, or simply a highlight shape, and infers the required distribution of surface slopes. We sample this distribution, optimize for a maximally-continuous and valley-minimizing height field, and finally mill the surface using a computer-controlled machine tool. We demonstrate a variety of surfaces, ranging from reproductions of measured BRDFs to materials with unconventional highlights.

Citation (BibTeX)

Tim Weyrich, Pieter Peers, Wojciech Matusik, and Szymon Rusinkiewicz. Fabricating Microgeometry for Custom Surface Reflectance. ACM Transactions on Graphics (Proc. SIGGRAPH) 28(3), August 2009.

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