Evan Richards website is great for anybody interested in cinematography. His posts cover entire movies in screenshots and are a great source on information. It's amazing to look at.
His post on reverse key lighting is just as informative. If you're into lighting or photography or film, Evan talks about how versatile this technique can be, even in CG.
Check out the rest of his post and awesome website here:
http://evanerichards.com/2012/2463
