Community extension: Hunyuan3D 2.1 Full (shape + PBR) #215

Hi — I built a community extension for the full Hunyuan3D-2.1 model and wanted to share it in case you'd like to list it alongside the official ones.

Repo: https://github.com/Elevatormusic/modly-hunyuan3d-2-1-shape-extension
Type: model
Model: Tencent Hunyuan3D-2.1 (full hunyuan3d-dit-v2-1, 3.3B params)

It wraps the full 2.1 shape checkpoint (not Mini), with an optional PBR texture pass:

• High-fidelity image-to-mesh geometry (~10 GB VRAM for shape).
• Optional PBR paint pass (~21 GB VRAM): albedo + packed metallic-roughness, UV-seam reconciliation, and a QA debug sheet.
• Mesh cleanup: Regular / Isotropic / BPT neural retopo.
• Adaptive texture-memory tiers (up to 4096) with an optional shared-RAM path so it fits a 24 GB card.
• CAD/print path: optional decimation + STEP/Fusion export (textures dropped for CAD).

Installs via Extensions -> Install from GitHub, builds its own venv, and pulls the weights from Hugging Face. Manifest is type: model with a standard params_schema. Tested on Windows 11 / RTX 3090; Linux (CUDA) should work too. Textures need a C++/CUDA build toolchain (VS Build Tools + a CUDA toolkit).

Happy to send a PR adding a "Community extensions" section if that's easier, and glad to adjust anything for inclusion. Thanks for Modly.