I use thumbnail sketches to work out design issues, figure out the best way to tell a story, and to experiment with angles.
A moment in time can be captured in a number of unique ways. And each way can evoke a different feeling—It can tell a different story. It's my job to figure out which images are going to tell the right story in the very best way.
These thumbnail drawings are typically no more than an inch to an inch and a quarter at their widest or tallest. But, as you can see, I try to be fairly informative and ad quite a bit of detail for such small images.
These thumbnails are also what get used in dummy books, so it's important to get it as close to right as I can. Not to mention, I'd rather not still be working out design issues by the time I'm actually applying paint.