Non-linear kernel-based precomputed light transport

Paul Green (MIT)
Jan Kautz (MIT)
Wojciech Matusik (Merl)
Fredo Durand (MIT)
Henrik Wann Jensen (UCSD)


We propose a real-time method for rendering static objects with complex materials under distant all-frequency lighting. Existing precomputed light transport approaches [Sloan et al. 2002; Ng et al. 2003] can render objects with complex material properties (e.g., anisotropy, translucency) and complex global illumination effects (e.g., inter-reflections, soft shadows, subsurface scattering). However, they are either restricted to low-frequency illumination or they assume a fixed viewer. In this sketch we propose a solution that allows both. Our method is based on two components: (1) a compact non-linear representation for precomputed light transport that can be integrated rapidly with the distant all-frequency illumination, and (2) a new interpolation scheme that enables rendering of an arbitrary viewpoint from only a sparse set of precomputed views. Figure 1 shows an object rendered using our method.


Paul Green, Jan Kautz, Wojciech Matusik, Fredo Durand, and Henrik Wann Jensen
SIGGRAPH'2004 Technical Sketch

KBPLT.pdf (0.5MB)