Nvidia’s new RTX technology, explained
For as long as videogames have existed on a 3D plane, we’ve had those pesky CG movies and their superior visuals lording it over our real-time virtual worlds. The ray tracing rendering technique has played a defining role in that discrepancy—it’s one of the best methods of simulating light behavior around but, prior to Nvidia’s RTX graphics card reveal, it simply hasn’t been possible to achieve in real time.
Ray tracing’s been around for decades in movies, because movie CG takes its sweet time to render. At industry-leading effects houses such as Industrial Light & Magic, a 30-second scene might take three weeks to bake, while your poor old PC has to do everything—objects, surfaces, shadows, diffusion, reflections—before your monitor asks for the next frame. In the simplest terms possible, the more time afforded to a renderer, the more complex mathematics it can run to achieve a more realistic scene.
So when Nvidia announced that its new Turing GPUs were capable of running this impossible clusterfluff of arithmetic in real time, the graphics giant did so knowing it had just bridged the gap between prebaked CGI and gaming graphics. It used the term ‘Holy Grail’ a lot during the 20xx series card reveal, and you can understand why. Developers have been promising movie-level graphical fidelity in videogames for years now, most notably CD Projekt RED, whose magnum opus The Witcher 3… um, didn’t exactly fulfil that promise. You look wonderful, Geralt dear, but you’re not exactly making gamers rub their eyes in cartoon-like disbelief that what they’re seeing isn’t reality.
THE LIGHT FANTASTIC
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