Fabricating Microgeometry for Custom Surface Reflectance
ACM Transactions on Graphics (Proceedings of SIGGRAPH 2009)
| Tim Weyrich1 Pieter Peers2 Wojciech Matusik3 Szymon Rusinkiewicz3,4 |
| University College London1 University of Southern California, Institute for Creative Technologies2 Adobe Systems, Inc.3 Princeton University4 |
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 x 30 facets, each approximately 1mm x 1mm), 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 high lights.
Material:
SIGGRAPH 2009 Paper:
- SIGGRAPH2009_FMC-highres.pdf, 10.4 MB. ( Adobe Acrobat )
- SIGGRAPH2009_FMC-lowres.pdf, 421 KB. ( Adobe Acrobat )