Time for another episode. This is the entry thread for submitting designs/thumbnails.
Here's the primer video: http://youtu.be/g1zLjenw0as
I recommend making a lot but only sharing the small number that you decide are your very best. You don't want to flood out your own best designs with a bunch of subpar ones.
Remember, this isn't a rendering contest. Design is what matters. Keep your art at a preliminary design level.