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arXiv · 2606.26612

HiPR: Hierarchical Progressive Rendering for Immediate Feedback

Rafael Padilla·Andrew Tate·Dhruv Ram·Cem Yuksel
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Abstract

Hierarchical Progressive Rendering (HiPR) is a dynamic render-scheduling algorithm that makes interactive path tracing finally feel real-time. While most renderers recompute the entire frame after any change to the scene, our method updates some of the pixels based on a priority order while keeping the others unchanged. Rather than relying on error-driven or temporal reuse heuristics, it amortizes rendering costs by organizing pixels into a hierarchy of light-path dependencies from changed elements outward, prioritizing by perceptual impact and delivering instant visual feedback, while eventually converging to an unbiased result.

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Rafael Padilla, Andrew Tate, Dhruv Ram, Cem Yuksel. 2026-06-25. HiPR: Hierarchical Progressive Rendering for Immediate Feedback. https://doi.org/10.1145/3799821.3820912

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