“Performance Geometry Capture for Spatially Varying Relighting”

In image-based relighting, novel illumination on a subject is synthesized based on images acquired in different basis lighting conditions. Most commonly, the basis images of the subject are taken under a variety of different directional lighting conditions. A linear combination of the color channels of the different lighting directions is formed to produce the rendering under novel illumination. When the lighting directions are densely distributed throughout the sphere, any distant lighting environment can be simulated accurately.

Masselus, V., Peers, P., Dutré, P., And Willems, Y. D. 2003. Relighting with 4d incident light fields. ACM Transactions on Graphics 22, 3 (July), 613–620.
Wenger, A., Gardner, A., Unger, J., Tchou, C., Hawkins, T., And Debevec, P. 2005. Performance relighting and reflectance transformation with time-multiplexed illumination. Conditionally Accepted to ACM Transactions on Graphics (SIGGRAPH 2005).