![]() The extra level of detail is tangible-if you know where to look-and it's effectively free in performance terms, sometimes better than free. Like Frame Generation, Nvidia has unlinked Ray Reconstruction from DLSS, but if you're using ray tracing in any form, in any compatible game, based on my experience, flip that damned switch. That makes Ray Reconstruction an absolute must for high-end GPUs running ray tracing. But with Ray Reconstruction enabled that leapt up to 103 fps simply from ditching that denoising step. On Overdrive, with the path tracing tech demo at 4K, and with DLSS set to Quality and Frame Generation set on, I was getting 69 fps on average. With that step gone, I was seeing a serious boost in performance with the RTX 4090 I was using to test the feature. ![]() Where the path tracing mode of the game needs a lot of GPU resources, it utilises a lot of denoisers in the pipeline. Ray Reconstruction, while still part of DLSS, is not necessarily about increasing performance, but it certainly does at the high-end. The temporal nature of denoising can add in weird graphical effects and ghosting, and then the final blending stage can smear away detail from a scene. That's how you get the cleaner, not-so-speckly final image in something like Cyberpunk 2077.īut it's still just another layer of fakery, with Nvidia itself calling this accumulation of pixels in a temporal fashion across multiple frames "stealing rays from the past." That's fine for a static image, where that accumulation of pixels will be more or less the same from one moment to the next, but in motion is where it falls down. ![]() First, they track and group pixels temporally across multiple frames, essentially allowing for more samples, then they use neighbouring pixels from these representative samples, and finally interpolate from them, essentially blending them together. These so-called hand-tuned denoisers use two different methods to fill in the blanks. So, from there it's the job of the denoisers to fill in the missing pixels that didn't result from the firing of those few specific light rays. The final blending stage can smear away detail from a scene.īut this noisy image is far from what you want the final look of your game to be. ![]()
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