RFD 1029 details: the three replacements

PartField replacement (mesh segmentation)

The web search from August 2026 found three MIT candidates.

• PartSAM (czvvd/PartSAM, ICLR 2026) segments parts on native 3D data. It supports a segment-every-part mode.
• HoloPart (VAST-AI/Research) completes occluded parts.
• OmniPart (HKU-MMLab, SIGGRAPH Asia 2025) does part-aware 3D generation.

PartSAM is the primary recommendation. It trains on native 3D data, so it works on AI-generated meshes. PartField needs clean mesh connectivity, which generated meshes lack.

FastMesh replacement (retopology)

The catalog already carries Instant Meshes under the BSD-3 license. It is the primary replacement. QuadriFlow, meshoptimizer, trimesh_decimate, and AutoRemesher are the MIT alternatives.

The QuadWild Bi-MDF fork does not qualify. It uses the GPL-3 license.

PartPacker replacement (image to raw mesh)

The catalog already carries TRELLIS.2 and TRELLIS. Both use the MIT license. Prefer them over PartPacker.