>>6485529>They based it on the worst-animated episodes of the cartoon, which is why it has that stupid gray spot on the crotch which looks awful and was probably a coloring error.Actually it's because Hot Rod had an impossible transformation when Floro Dery designed him: Hot Rod's pelvis is his car mode's entire windshield. His wrists are the tail lights. His front wheels end up on the back of his arms, despite his front end facing the front of his robot mode. AKOM consistently colored Hot Rod and Rodimus's pelvis like they were a window, as they were meant to be.
In fact, MP09 tributed the fact that Hot Rod's windscreen turns into his crotch by casting the part in Translucent plastic and sculpting in driving compartment detail inside.