Structured Importance Sampling of Environment Maps

@inproceedings { AgarwalRBJ03,
title = {Structured Importance Sampling of Environment Maps},
booktitle = {SIGGRAPH},
year = {2003},
address = {San Diego, CA},
author = {Sameer Agarwal and Ravi Ramamoorthi and Serge Belongie and Henrik Wann Jensen}
}