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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.
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Citation

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.

BibTeX

@article{Weyrich:2009:FMF,
   author = "Tim Weyrich and Pieter Peers and Wojciech Matusik and Szymon
      Rusinkiewicz",
   title = "Fabricating Microgeometry for Custom Surface Reflectance",
   journal = "ACM Transactions on Graphics (Proc. SIGGRAPH)",
   year = "2009",
   month = aug,
   volume = "28",
   number = "3"
}