While this does fall somewhat under the "it looks nice" bracket of technical improvements, Massive is adamant that improving some of the more complex visuals will help players get into the idea that they're on the Pandora of James Cameron's original movie, not just another game world.
"It's a first-person game," says Jansén. "It's, to me, the most immersive way of playing. So we're really going all-in on that vision of, 'Remember the movie, remember you wanted to go to Pandora.' Now you can go to Pandora and, to do that, we needed to have the best simulation of weather, rain, animals, and the best rendering, because the more technically excellent it is, the more capable it is of taking you from where you are and into the world of Pandora."
Stefanov gives some examples of what that can mean to the game: "In terms of a new generation of consoles, the improved [hardware] just gives us so much opportunity to make sure that the game's as immersive as possible. So a couple of examples, we have a completely new lighting system that is based on ray tracing, and I think it is a dramatic step up in quality that makes you feel like it's a real place. One tiny example is that it can actually handle the translucency of the leaves [...] so it can figure out how much of the light is reflected through the leaves, how tinted it is with the colors and everything else. You get lovely reflections and sights for the water, even down to the volumetric clouds up in the sky – they actually receive the correct lighting as well."