If you asked about drawing process - at first I took a pencil and sketched contour at paper, A4. After this I took ballpoint pen and detalize contour, and remove pencil sketch. After - drew shadows and camo by pencil, scan it. In Adobe Photoshop 8.0 I remove all background. exclude vehicle, add background picture, change color, etc... It's all.
I like the design a lot! Is that thing on the front a bulldozer blade, or a stabilizer for when it's firing? And does it fire the cannons both at the same time, or does it fire them one at a time? Also, I like that Machine gun/Autocannon turret on top of the main turret a lot!