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3D Gaussian Ray Tracing: Fast Tracing of Particle Scenes
-based representations of radiance fields such as 3D Gaussian Splatting, have found great success for reconstructing and re-rendering of complex scenes. Most existing methods render particles via rasterization, projecting them to screen space tiles for processing in a sorted order.
We further propose related improvements to basic Gaussian representation, including a simple use of generalized kernel functions which significantly reduces particle hit counts. This allows us to eliminate the rectification step used in the preprocessing stage of 3D Gaussian Splatting, leading to higher quality outputs by supervising on all available pixels rather than just a subset in the rectified cameras. Compared to rasterization-based approaches, our ray tracing-based method naturally supports complex camera models, such as distorted fisheye lenses.
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