like a tank." Visual effects supervisor Kurt Williams envisioned the Hulk's physique as a linebacker rather than a bodybuilder. A height of nine feet was chosen for the character as they did not want him to be too inhuman. To make him more expressive, computer programs controlling the inflation of his muscles and saturation of skin color were created. Williams cited flushing as an example of humans' skin color being influenced by their emotions. The animators felt green blood would make his skin become darker rather than lighter, and his skin tones, depending on lighting, either resemble an olive or even gray slate. His animation model was completed without the effects company's full knowledge of what he would be required to do: he was rigged to do whatever they imagined, in case the model was to be used for The Avengers film. The Hulk's medium-length hair was modeled on Mike Deodato's art. He originally had a crew cut, but Leterrier decided flopping hair imbued him with more character. Leterrier cited An American Werewolf in London as the inspiration for Banner's transformation, wanting to show how painful it was for him to change. As a nod to the live action TV series, Banner's eyes change color first when he transforms. Leterrier changed the Abomination's design from the comics because he felt the audience would question why he resembled a fish or a reptile, instead of "an über-human" like the Hulk. Rather, his hideousness is derived from being injected multiple times into his skin, muscles and bones, creating a creature with a protruding spine and sharp bones that he can use to stab. His green skin is pale, and reflects light, so it appears orange because of surrounding fire during the climactic battle. The motion capture performers, including Roth, tried to make the character behave less gracefully than the Hulk. They modeled his posture and the way he turns his head on a shark. The character also shares Roth's tattoos. A height of eleven feet was chosen for the character. Leterrier tried to work in the character's pointed ears, but realized the Hulk would bite them off (using the example of Mike Tyson when he fought Evander Holyfield), and felt ignoring that would make the Hulk come across as stupid. Leterrier had planned to use prosthetic makeup and animatronics to complement the computer-generated imagery that was solely used in the previous film.