My last blog post seems like a good fit in this section, here it goes:
http://codelab.wordpress.com/2012/11/03/generating-multiple-sample-positions-per-pixel/It describes methods of generating multiple sub-pixel sample positions within the area of a pixel, for doing anti-aliasing, and monte-carlo rendering techniques in ray tracers.
I've written a few more tutorial-ish articles in the past, I'll post more of them here if there is interest.
