Underpainting Time Lapse

I figured out that I can use the web-cam on my computer screen to make time-lapse videos, which is pretty cool. This way I don't have to bug Chris about always borrowing his camcorder (check out his blog by the way, he's been doing some kick-ass photography). This was just going to be a sketch, but I like the direction it's heading in, so I've turned it into an underpainting for a more finished piece.