Treyarch designer director David Vonderhaar is baffled by the issues fans may have with the Call of Duty game engine. Speaking to the Official Xbox Magazine, Vonderhaar said the Call of Duty: Black Ops II engine is replete with new features and does not resemble any older iteration.

　　"People like to talk about the engine, but the truth of the matter is that this isn't like something that was invented six years ago," he said. "At this point that engine doesn't resemble anything like any engine. We've ripped out the UI system; the rendering and the lighting are all new, the core gameplay systems are all new."

　　"To me, it's like I never really understood," Vonderhaar added. "It runs at 60 [frames-per-second] and it's gorgeous. What exactly is there to be upset about with the engine?"

　　Vonderhaar's comments follow a statement from Treyarch studio head Mark Lamia, who said in May that he is aware fans want a "better-looking" Call of Duty game. He claimed that the studio did not need to build an all-new engine to achieve this, but rather continue to tweak the existing engine to offer new features, like lighting advancements.