NVIDIA’s AI Update Cleans Up Ray Tracing for Games on Every RTX Graphics Card with DLSS 4.5 Ray Reconstruction

Players chasing realistic lighting and reflections in games often run into the same frustrations. Ray tracing looks impressive in theory because it simulates how light actually bounces around a scene. In practice, engines fire fewer rays than ideal to protect frame rates, which leaves behind grainy noise that older cleanup tools struggle to fix without blurring details or creating odd trails behind moving objects. NVIDIA addressed those issues with a new version of its Ray Reconstruction feature inside the DLSS family. The update relies on a second generation transformer model trained on far more data than before. It processes 20 percent more parameters and handles 35 percent more computations internally, yet it keeps performance roughly in line with the previous release.

The model now takes critical information straight from the game engine, such as motion data and how the engine samples individual pixels, giving the AI crucial new context to assist it decide what to keep and reject. This means that developers now have far more control over how information accumulates from one frame to the next, allowing them to fine-tune the outcomes to match the artistic vision for every game they’re working on.

Consider Indiana Jones and the Great Circle as an example: those pesky snow particles no longer leave ugly ghosting trails when a character moves about. PRAGMATA becomes cleaner as the strong laser effects flicker over the image, leaving less junk to deal with once the light fades. Alan Wake 2 makes a much better job of preserving the very fine lines of vintage CRT TVs, which tended to blur and lose all of their wonderful detail for no apparent reason.

These small but significant adjustments may appear insignificant on their own, but they add up and make a tremendous difference over long gaming sessions. The good news is that the improved reconstruction works on all GeForce RTX graphics cards, including previous models from the 20 and 30 series. You don’t need the most recent hardware to benefit from this, either, because everything will be available via the NVIDIA app in August, once the game publishers have issued the necessary modifications. They already have 27 games planned to take advantage of this at launch, including Cyberpunk 2077, Hogwarts Legacy, and Star Wars Outlaws, as well as a number of other titles that will be launched immediately or very soon.

This isn’t just for games; the same AI approach is already being used as a denoiser in Blender. The upcoming version 5.3, which should be ready in the fall, gives 3D artists a far better understanding of how lighting will appear in the scene without having to wait for the full render to complete. Over a thousand games and applications have already benefited from NVIDIA’s extended RTX capabilities, which is fascinating.
[Source]