Printing anisotropic appearance with magnetic flakes

Thiago Pereira, Carolina L.A.Paes Leme, Steve Marschner, Szymon Rusinkiewicz

Research output: Contribution to journalConference articlepeer-review

11 Scopus citations


The ability to fabricate surfaces with fine control over bidirectional reflectance (BRDF) is a long-standing goal in appearance research, with applications in product design and manufacturing. We propose a technique that embeds magnetic flakes in a photo-cured resin, allowing the orientation distribution of those flakes to be controlled at printing time using a magnetic field. We show that time-varying magnetic fields allow us to control off-specular lobe direction, anisotropy, and lobe width, while using multiple spatial masks displayed by a UV projector allows for spatial variation. We demonstrate optical effects including bump maps: flat surfaces with spatially-varying specular lobe direction.

Original languageEnglish (US)
Article number123
JournalACM Transactions on Graphics
Issue number4
StatePublished - 2017
EventACM SIGGRAPH 2017 - Los Angeles, United States
Duration: Jul 30 2017Aug 3 2017

All Science Journal Classification (ASJC) codes

  • Computer Graphics and Computer-Aided Design


  • Fabrication
  • Spatially-Varying BRDF


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