I hate to start off a review with a request, but..
Do you think that you could give this bad boy a paint job, make it animated, and covert it to something such as an avi file? If you could then you would be coauthored on a Christmas/star wars parody that I'll be submitting this Christmas.
Alright, no more request, but please PM me if you're interested. I couldn't tell if my eyes were playing tricks on me or if there was a shadow below the walker. I guess that's how you want shadows to be though so great job there.
It's a great 3-D image and I've had a little practice with using some 3-D stuff many years ago back in high school. It wasn't the easiest thing thing in the world, but after you figured it out it was pretty easy. I'll admit though I haven't made anything as complex as this so great job.
I could definitely see this in a setting with snow, blood smeared into the white snow, smoke in the distance and perhaps some soldiers running by slightly faded in the background.
So yeah if you make this with color and background it would be by far one of my favorite pieces of art on newgrounds. As the plain model it kind of goes down to the lower section of my favorites and more for bookmarking purposes then having it as a favorite.