After experiencing the look of the Plant Men on the second cover of the series, I was hesitant to follow exactly Burroughs' description of the Synthetic Man. He is described as being all mixed up physically, and his brain actually belongs to someone else, so he is unavoidably cartoony, but he is also a great guy and the hero of the story! A real quandary for me, but I had a lot of fun with the actual execution of the work.