We propose a method for avoiding the statistical bias of Metropolis light transport with multiple importance sampling based on the primary sample space. The statistical bias produces incorrect results which are much brighter or darker than true result in physically based rendering. This problem has been ignored because it appears only in special scenes. We solve the statistical bias problem by using two image buffers for storing sampling results.
|Number of pages||9|
|Journal||Journal of the Institute of Image Electronics Engineers of Japan|
|Publication status||Published - 2009 Jan|
- computer graphics
- global illumination
- Metropolis light transport
- multiple importance sampling