Jingwen Wang, Ravi Ramamoorthi. Analytic spherical harmonic coefficients for polygonal area lights. ACM Trans. Graph., 37(4):54, 2018. [doi]
@article{WangR18-7,
title = {Analytic spherical harmonic coefficients for polygonal area lights},
author = {Jingwen Wang and Ravi Ramamoorthi},
year = {2018},
doi = {10.1145/3197517.3201291},
url = {https://doi.org/10.1145/3197517.3201291},
researchr = {https://researchr.org/publication/WangR18-7},
cites = {0},
citedby = {0},
journal = {ACM Trans. Graph.},
volume = {37},
number = {4},
pages = {54},
}