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arXiv · 2511.22459

Gaussians on Fire: High-Frequency Reconstruction of Flames

Jakob Nazarenus·Dominik Michels·Wojtek Palubicki·Simin Kou·Fang-Lue Zhang·Sören Pirk·Reinhard Koch
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Abstract

We propose a method to reconstruct dynamic fire in 3D from a limited set of camera views with a Gaussian-based spatiotemporal representation. Capturing and reconstructing fire and its dynamics is highly challenging due to its volatile nature, transparent quality, and multitude of high-frequency features. Despite these challenges, we aim to reconstruct fire from only three views, which consequently requires solving for under-constrained geometry. We solve this by separating the static background from the dynamic fire region by combining dense multi-view stereo images with monocular depth priors. The fire is initialized as a 3D flow field, obtained by fusing per-view dense optical flow projections. To capture the high frequency features of fire, each 3D Gaussian encodes a lifetime and linear velocity to match the dense optical flow. To ensure sub-frame temporal alignment across cameras we employ a custom hardware synchronization pattern -- allowing us to reconstruct fire with affordable commodity hardware. Our quantitative and qualitative validations across numerous reconstruction experiments demonstrate robust performance for diverse and challenging real fire scenarios.

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Jakob Nazarenus, Dominik Michels, Wojtek Palubicki, Simin Kou, Fang-Lue Zhang, Sören Pirk, Reinhard Koch. 2026-07-02. Gaussians on Fire: High-Frequency Reconstruction of Flames. https://arxiv.org/abs/2511.22459

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