Boulder - my character for the X-Men competition

I've decided to participate in a competition of making a new X-Men character.
Here are a few drawing phases (roughly skipped I'm afraid) I was going through from sketch to the final drawing.
I admit, if only I had some more time I would keep on going and add some more details).

Phase 1: Sketching with my tablet straight to the computer, trying to get an interesting form while keeping a clear silhoutte as possible.

Phase 2: After making the basic lines I added blocks of color to the different parts using the artline.

Phase 3: Adding more details and especially shadows and highlights.

Phase 4: Smoothing the shadows and highlights and tweaking the saturation and hues.

Phase 5: Combining the background and adding little effects to better the composition