Here are a couple of thumbnail sketches for my Sea Shepherd krill campaign commission. We decided to go with the penguin protest, mainly because I thought it shows a more direct message (apart from that it is also slightly easier to draw).
I have attached my progress. I started illustrating the background first and have already rendered that in colour, overlaying it with some textures from my own photographs. I have not previously experimented with the application of textures and I am pleased at the result. I think the ice loogs quite realistic while still having a posterised cartoon-like effect.