charming cartoon sketch of an angry robot - photo-realistic technique

cartoon sketch angry robot photorealistic technique charming characters funny face old sketching techniques artwork humorous character design digital art comic style robotic expressions artistic rendering features strip facial development personality sketchbook book humor creative drawing creation skills photo-realistic isolated vector white background featuring grungy walls brian kesinger alex timmermans captures essence robot's anger close-up view showcases intricate details reminiscent graphite realism influence e h shepard's expressive expression