ConeGaussian: closed-form anisotropic pixel filter fixes aliasing in Gaussian ray-tracing
zhenjun_zhao · x · 2026-09-16
An ETH Zurich-led paper (with Luc Van Gool) tackles aliasing in Gaussian ray tracing for generic central cameras, where pixels are reduced to a single center ray. ConeGaussian builds an anisotropic pixel footprint directly from neighboring rays via the camera's native inverse mapping, deriving a closed-form response under a locally linear, depth-local, moment-matched approximation, plus a per-Gaussian training-frequency floor.
The filtering principle applies unmodified across calibrated central camera models and multiple Gaussian ray-rendering backbones, and — unlike mip-splatting — allows trivial composition.
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