让3D高斯点能模拟脆性断裂，实现材质混合物体的逼真动态渲染。
GaussianFluent: Gaussian Simulation for Dynamic Scenes with Mixed Materials
- 用生成模型增强高斯点内部结构，生成真实纹理的体素内层。
- 结合优化的损伤材料点法，实现高速脆性断裂模拟。
- 适合虚拟现实与机器人场景中的高保真动态物理仿真。
3D高斯点绘图（3DGS）已成为高保真、实时渲染的重要3D表示方法。现有工作虽将物理模拟与高斯点结合，但主要针对柔软可变形材料，对脆性断裂问题仍无解。根源在于：高斯点表示缺乏具有连贯纹理的体素内部结构，且缺少针对高斯点的断裂感知模拟方法。为此，我们提出GaussianFluent，一个统一的动态物体状态模拟与渲染框架。首先，通过生成模型引导的内部高斯点稠密化，合成逼真的内部视觉结构。其次，集成优化的连续损伤材料点法（CD-MPM），实现高速脆性断裂模拟。本方法可处理复杂场景，包括多材质物体和多阶段断裂传播，结果远超此前方法。实验表明，GaussianFluent在保持结构一致性的同时，实现照片级实时渲染，具备在虚拟现实与机器人等下游应用中的潜力。
原文摘要 · Abstract (English)
3D Gaussian Splatting (3DGS) has emerged as a prominent 3D representation for high-fidelity and real-time rendering. Prior work has coupled physics simulation with Gaussians, but predominantly targets soft, deformable materials, leaving brittle fracture largely unresolved. This stems from two key obstacles: the lack of volumetric interiors with coherent textures in GS representation, and the absence of fracture-aware simulation methods for Gaussians. To address these challenges, we introduce GaussianFluent, a unified framework for realistic simulation and rendering of dynamic object states. First, it synthesizes photorealistic interiors by densifying internal Gaussians guided by generative models. Second, it integrates an optimized Continuum Damage Material Point Method (CD-MPM) to enable brittle fracture simulation at remarkably high speed. Our approach handles complex scenarios including mixed-material objects and multi-stage fracture propagation, achieving results infeasible with previous methods. Experiments clearly demonstrate GaussianFluent's capability for photo-realistic, real-time rendering with structurally consistent interiors, highlighting its potential for downstream application, such as VR and Robotics.
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