I drew 18 famous robots for Chato.ps (one of our company product) before,and lots of people ask me how to do it in sketch,is that difficult?actually not,it’s super simple and quick.so I made this tutorial to show the making of. you don’t need to use a pen tool to add lots of vector point and measure, adjust the curves.and you don’t need to use mouse to look up the sketch menu to find all the funct