This is a good one, in fact I was planning to do that mech myself in 3D. I just have alot of other things to do right now. Brazil is bliss!
Oh well, the pic: It's a good render, nice cartoony texture. But because I have seen the episod with the spider-tank (ep 2) at least 6 times now, I notice alot of proportion problems. The body is longer and the sensors on the front a alot smaller. The tail is way too big and the back leg is clipping in to the body. The outline is nice but a little too thick.
I'm glad that it's not a Brazil "classic". Most people use it to just render everything in the standard blue color and settings which is getting very old.