Eric P. Lafortune and Yves D. Willems
Proceedings of the International Conference on Computer Graphics '93, Bombay, India (February 1993), pp. 71-78.
This paper discusses different interpolation schemes for the radiosity method. It is shown that similar mathematical expressions exist for piece-wise constant approximation and linear approximation of the radiosity function. The latter improves accuracy and does not necessarily entail a higher complexity. Our implementation of a linear interpolation scheme demonstrates that hierarchical and adaptive meshing can be used elegantly.