MeGAS: Thermomechanical Dynamic Gaussian Splatting for Thermophysical Scene Editing

• URL: http://arxiv.org/abs/2606.23455v1
• Date: Mon, 22 Jun 2026 15:05:59 GMT
• Title: MeGAS: Thermomechanical Dynamic Gaussian Splatting for Thermophysical Scene Editing
• Abstract summary: We propose MeGAS, a framework that incorporates thermomechanical phase-change dynamics into 3D Gaussian Splatting (3DGS)<n>MeGAS produces physically consistent thermomechanical behavior while maintaining high-fidelity photorealistic rendering, advancing toward physics-integrated world models.
• Score: 53.96914021628847
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Recent advances integrate physically grounded Newtonian dynamics with neural rendering frameworks, narrowing the gap between photorealistic scene reconstruction and physics-based animation. However, existing approaches focus on mechanically driven dynamics while neglecting temperature, a fundamental yet invisible physical factor underlying phenomena such as melting, solidification, and other thermomechanical processes. In this paper, we propose MeGAS, a novel framework that incorporates thermomechanical phase-change dynamics into 3D Gaussian Splatting (3DGS). Specifically, we propose a new thermomechanical dynamic Gaussian Splatting representation that augments 3DGS with temperature attributes and employs a heat advection-diffusion solver with MPM dynamics incorporating phase transitions, enabling physically plausible and visually realistic synthesis of thermophysical phenomena. Furthermore, a new topology-adaptive Gaussian rendering strategy is proposed to mitigate cracking and floaters under extreme deformation. Extensive experiments demonstrate that MeGAS produces physically consistent thermomechanical behavior while maintaining high-fidelity photorealistic rendering, advancing toward physics-integrated world models.

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