This is my submission for the Droid design section of the ILM Art Dept Challenge.

The brief said he should be like R2's little bro', his sidekick, but he's a little annoying, a touch feisty.
My idea was to back engineer BB-8 by 40 years, and have him based on his larger sibling. But rather than being an Astromech, this guy is designed to work with Armored units and artillery.

All modelled in Cinema 4D and rendered with C4D's Sketch & Toon and Octane Render. A little post work in Photoshop.