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YouTube's 'Thavex' has shared a video, showing Quake 2 Path Tracing running on the latest high-end GPU, the NVIDIA GeForce RTX 2080Ti. In case you were not aware of this real-time path tracing is possible thanks to Amietia; a from-scratch GPU-based pathtracer created specifically for Quake 2.
Amietia – which has several optimizations which are only viable due to the characteristic characteristics of parallel beams, and BSP ray traversal, and special handling of sky 'surfaces' (portals).
There is a lot of noise (which is a side-effect to the low samples that are used for real-time path tracing). From what I know its developer has not used any de-noiser which is a shame. Not only that, but this GPU-based pathtracer does not take advantage of the RTX2080Ti tensor cores.
What is this particular version of Quake 2 could be significantly faster on the RTX2080Ti. Thavex has used an i7-6700k (overclocked to 4.7Ghz) alongside the NVIDIA GeForce RTX2080Ti and ran the game at 1920 × 1080. It's not entirely smooth but keep in mind that we're talking about full path tracing in real-time.
Here is hoping that someone will resume this GPU pathtracer so that it can take advantage of the Cores Tensor (a de-noiser filter would also be a welcome addition)!
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