Storyboard Thumbnails

For my sequence I decided to do a sparring session between Ryu and Ken (Street Fighter) I started off by roughly sketching out my thumbnails on paper 

I then roughly redrew the frames in photoshop using these for my under-sketches 

Using my second frame as an example, I made a copy of the initial sketch and refined it. Adjusting various parts of the drawing as I go  

To begin my process of adding value I use a square brush to loosely lay grey under the sketch.