ResearchResearch paperImage, Video & 3D Generation1 source · Oct 11, 2026

UMAS3D: Unified Mask-Free 3D Editing with Region-Adaptive Source Preservation

We propose UMAS3D, a unified 3D editing framework that is training-free, inversion-free, and free from external 3D masks.

Key points

  • 3D editing aims to modify an existing 3D asset according to user intent while preserving geometry and appearance outside the intended edit region.
  • UMAS3D converts text, bounding boxes, reference images, and their combinations into common target-view guidance, after which addition, deletion, modification, appearance, and pose editing share the same downstream 3D generation process.
  • Mask-Free Adaptive Region Modeling (MARM) initializes an Edit/Keep prior from source-target visual differences and progressively refines it as the target structure evolves, while Source-Guided Preservation Steering (SGPS) constrains the current Keep-region states to retain source geometry and appearance without suppressing target-driven changes.
  • Experiments show that UMAS3D supports addition, deletion, modification, appearance, and pose editing while effectively preserving unedited source content.

Sources (1)

  • [1]UMAS3D: Unified Mask-Free 3D Editing with Region-Adaptive Source Preservation
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 11, 11:11 AM
    We propose UMAS3D, a unified 3D editing framework that is training-free, inversion-free, and free from external 3D masks.
    3D editing aims to modify an existing 3D asset according to user intent while preserving geometry and appearance outside the intended edit region.

Extractive summary: sentences quoted from the sources.

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