Order by: Date | Author | Title | Index of all authors | Index of Pixar Technical Memos

Building an Orthonormal Basis, RevisitedTom Duff, James Burgess, Per Christensen, Christophe Hery, Andrew Kensler, Max Liani, Ryusuke VilleminMarch 2017Frisvad [2012b] describes a widely-used computational method for augmenting a given single unit vector with two other vectors to produce an orthonormal frame in three dimensions, a useful operation for any physically based renderer. The implementation has a precision problem: as the z component of the input vector approaches -1, floating point cancellation causes ... more Paper (PDF) | |

Importance Resampling for BSSRDFRyusuke Villemin, Christophe Hery, Per ChristensenNovember 2016We present a method to improve BSSRDF rendering, which reduces variance due to sampling of the scattering exit point. By using importance resampling, we are able to sample any arbitrary diffusion model, taking into account the geometry of the object at the same time. The new method is trivial to implement ... more Paper (PDF) Available as Pixar Technical Memo #16-05 |