Gaussian Splashing: Unified Particles for Versatile Motion Synthesis and Rendering

TL;DR

This paper introduces a unified framework combining physics-based solid and fluid animations with 3D Gaussian Splatting, enabling realistic rendering and dynamic interactions in virtual scenes.

Contribution

It presents a novel integration of Gaussian Splatting with physics-based dynamics, enhancing realism and interaction in 3D scene synthesis.

Findings

Realistic surface highlights on fluids achieved

Elimination of spiky noises in solid deformation

Enhanced view synthesis with dynamic interactions

Abstract

We demonstrate the feasibility of integrating physics-based animations of solids and fluids with 3D Gaussian Splatting (3DGS) to create novel effects in virtual scenes reconstructed using 3DGS. Leveraging the coherence of the Gaussian Splatting and Position-Based Dynamics (PBD) in the underlying representation, we manage rendering, view synthesis, and the dynamics of solids and fluids in a cohesive manner. Similar to GaussianShader, we enhance each Gaussian kernel with an added normal, aligning the kernel's orientation with the surface normal to refine the PBD simulation. This approach effectively eliminates spiky noises that arise from rotational deformation in solids. It also allows us to integrate physically based rendering to augment the dynamic surface reflections on fluids. Consequently, our framework is capable of realistically reproducing surface highlights on dynamic fluids and facilitating interactions between scene objects and fluids from new views. For more information, please visit our project page at \url{https://gaussiansplashing.github.io/}.