A median cut algorithm for light probe sampling

Paul Debevec
2006 ACM SIGGRAPH 2006 Courses on - SIGGRAPH '06  
We present a technique for approximating a light probe image as a constellation of light sources based on a median cut algorithm. The algorithm is efficient, simple to implement, and can realistically represent a complex lighting environment with as few as 64 point light sources.
doi:10.1145/1185657.1185688 dblp:conf/siggraph/Debevec06a fatcat:37wx33rl3vbn7f27qwrrwe2kfu