Despite describing Call Of Duty: Ghosts' engine as "all-new" in the initial press releases, Infinity Ward has stated that it's instead been heavily upgraded from their existing tech, and packs enough sweeping improvements to legitimately be referred to as a brand-new.
Infinity Ward animation lead Zach Volker had an fascinating chat with OPM, during which he revealed some new (or should that be upgraded?) tidbits about Call Of Duty: Ghost's next-generation engine.
“When we’re talking about a new engine we’re talking about upgrading significant systems within in that engine," he said. "We’re not talking about throwing it all away and saying we’re starting from the ground up.
"So there is certainly going to be remnants here and there of our pieces of our last engine, where it was appropriate when, you know what, this doesn’t need any changing. It’s good the way it is. Because at Infinity Ward we make a really clear point to make sure we only upgrade the things that are necessary for driving the things and the gameplay experience we want to push for that project."
Volker suggested that it would be “impossible" to create an entirely new engine with only two years of tech development. "What we do is we say, ‘okay what are the things that are significant and that we would say that are encompassing of the engine or its visual quality? Are those being upgraded in a significant way? Alright, then I think that warrants that we’ve got a new engine on our hands”.
Call Of Duty: Ghosts' engine certainly seems to be vastly superior to previously Modern Warfare games (which is essentially id Tech 3 modified beyond all recognition), promising detailed facial animations, arm hair and fluid animations at 60 FPS. You can check out the recent developer diary and side-by-side comparison for more details.