Blog: progressive importance sampling

[iliyang]

The method is indeed unbiased, however calling it "progressive importance sampling" is slightly misleading. The term would be appropriate if the distribution caching and training was actually done during the whole rendering process. Currently, it's run as a pre-pass.

[Ondra]

yep, I had to take quite a few liberties to change the name into something an artist would actually remember ;)

[Javadevil]

Awesome, really interesting combining all these different methods into one to get  faster and accurate results.

Nice work