Freed from the obligations of other films in this genre, the main concern director Zack Snyder had to worry about was doing visual justice to the source material, Frank Miller's graphic novel. Adapting Miller's stylistic 300 into a breathing and in this film's case, bleeding affair involved a technique called Key Frame Art. I don't believe this technique was employed in Sin City, though that film involved a host of other digital techniques that would fill up an entry all on its own.

On the 300 production blog, Grant Freckelton posted a few images and wrote about about his involvement but really doesn't dwelve into the nitty gritty of the techniques in producing those shots. It's been quiet lately on that blog now that everyone is busy with post-production work but the few posts they do have up is very interesting. Take some time and enjoy the videos and most of all, check out the transformation images in the post linked below.