Switch to torch 2.9.1 + runtime nvdiffrast install

Revert to torch 2.6.0 + Jeff Xiang prebuilt nvdiffrast wheel

Install nvdiffrast at runtime instead of build time

Fix nvdiffrast ABI mismatch + pymeshfix TrackedArray crash

Fix pymeshlab pipeline crash + add post-process progress streaming

Fix all post-processing errors on ZeroGPU/headless environment

Add streaming progress to generate_hunyuan + fix omegaconf dep

Add onnxruntime for rembg background removal

Implement Hunyuan3D-2.1 generation with background removal

Fix: replace PyPI nvdiffrast (doesn't exist) with Jeff Xiang's prebuilt wheel

Milestones 6+8: albedo/material/AO baking + ORM pack, LODs, collision, pivot, scale

Milestone 4+5: UV unwrap (xatlas), symmetry, and normal map baking (nvdiffrast)

Milestone 3: Stage 2A-2C Mesh Cleanup (repair, cleanup, decimation)

Switch Stage 1 to gradio_client: all TRELLIS.2 custom wheels ABI-broken on torch 2.8+

Fix: bump torch to 2.8.0 for ZeroGPU compatibility (2.6.0 no longer supported)

Milestone 2: Wire TRELLIS.2 generation + vendor both model packages

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