Fabricating Microgeometry for Custom Surface Reflectance

 

Tim Weyrich Pieter Peers Wojciech Matusik Szymon Rusinkiewicz
UCL USC ICT Adobe Systems Inc. Princeton University
 
Siggraph 2009

 

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 (30x30 facets, each approximately 1mmx1 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

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

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