Portal with RTX kicks off a new retro ray tracing revolution

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Portal with RTX kicks off a new retro ray tracing revolution
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Portal with RTX looks phenomenal - and opens the door to a wealth of classic PC ray-traced remasters. digitalfoundry reports:

Portal with RTX is an absolute triumph, not just for its masterful use of lighting and cutting-edge technology, but also in how it works - which borders on black magic. This new take on the Valve classic is built on a new framework from Nvidia called RTX Remix, which essentially hijacks older PC games built on a fixed function rendering path, replacing rasterisation with full path tracing. Even motion vectors are added, opening the door to TAA, DLSS and even per-object motion blur support.

Portal with RTX also ray traces all the direct lighting as well, giving real-time shadows and lighting - something completely missing in the original. Objects that move now have shadows that move with them, particles receive the lighting of their surroundings, and emissive surfaces like signs emit light dynamically, whereas the lighting in the original game remained static no matter what happened.

Replacing basic cubemaps, path-traced specular lighting with four bounces on ultra dramatically changes metallic surfaces.">Portal with RTXPortal with RTXTextures and models have been completely remade.One Max Bounce

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