Illustration done for fun, slightly based on a concept found on a book, Keith Thompson 's "50 robots to draw and paint".
Actually I changed behaviour and background of the character, changing a bit its proportions: in my mind, this is the guy that take the money from your credit card when you pay online, so beware!
Really inspiring, buy it!

Modeled in 3dsMax, sculpted in ZBrush, rendered in KeyShot, post processing in Photoshop.