Last night I did some War Machine designs:
I like the stuff on the first page. The second page isn't as lively, although the image I have in mind of the large thing at the bottom is from a low angle on the battlefield and this particular design might look pretty cool as an illustration if not as a designed object.
Really, I have to remember that, like designing stuff seen in a movie, I probably only have to worry about this thing from one angle, even with the contest requirements of a concept art sheet. Designing for a video game, you need to design the whole object from all angles and think a lot about how it's going to move and act and be lit and all that. For this task I really don't have to worry about that - I just need to make a "pretty picture."
Hmf. Looks like I may be in a bit of a "shape rut" too. There are similarities between the Machine and Demon designs. I think I'll try a bit of Vyle's random brush techniques and see what happens there.