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arXiv · 2512.05354

SplatPainter: Interactive Authoring of 3D Gaussians from 2D Edits via Test-Time Training

Yang Zheng·Hao Tan·Kai Zhang·Peng Wang·Leonidas Guibas·Gordon Wetzstein·Wang Yifan
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Abstract

The rise of 3D Gaussian Splatting has revolutionized photorealistic 3D asset creation, yet a critical gap remains for their interactive refinement and editing. Existing approaches based on diffusion or optimization are ill-suited for this task, as they are often prohibitively slow, destructive to the original asset's identity, or lack the precision for fine-grained control. To address this, we introduce SplatPainter, a state-aware feedforward model that enables continuous editing of 3D Gaussian assets from user-provided 2D view(s). Our method directly predicts updates to the attributes of a compact, feature-rich Gaussian representation and leverages Test-Time Training to create a state-aware, iterative workflow. The versatility of our approach allows a single architecture to perform diverse tasks, including high-fidelity local detail refinement, local paint-over, and consistent global recoloring, all at interactive speeds, paving the way for fluid and intuitive 3D content authoring.

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Yang Zheng, Hao Tan, Kai Zhang, Peng Wang, Leonidas Guibas, Gordon Wetzstein, Wang Yifan. 2025-12-05. SplatPainter: Interactive Authoring of 3D Gaussians from 2D Edits via Test-Time Training. https://arxiv.org/abs/2512.05354

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