With all the GPU rendering, and smaller third party renderers coming out these days, one can really get lost in what the terms mean in this arena. If you are confused or have a hankering for some nerdy info, here are a few links that will clear up what is Biased, Unbiased, Consistent and which renderers in 3D will do which.
- Keenan Crane describes Bias in Rendering with this really complete overview.
- There is some more info including which rendering algorithms are consistent and which are unbiased at the CGAfaq.
- An older article at RenderSpud with commentary on Bias vs Unbiased.
- And finally Raúl Fernández Hernández on Unbiased rendering and Blender.