Add multi-view Mesh Refiner node with spatial blending

[cuzelac]

Summary

• Adds a new "Mesh Refiner Multi-View" node that refines meshes using per-view spatial blending (front/back/left/right) instead of single-view concat fusion
• Adds sample_mesh_slat_multiview() pipeline method combining mesh encoding/upsampling with multi-view spatial blending samplers
• Adds refine_mesh_multiview() pipeline method orchestrating the full multi-view refinement pipeline for shape and texture

Testing

All 6 tests passed against ComfyUI with RTX 5090 (32GB VRAM):

1. Node registration — Trellis2MeshRefinerMultiView appears in ComfyUI under Trellis2Wrapper category with correct input schema: front_image required, back_image/left_image/right_image optional.
2. Front-only (1 view) — Minimum viable input. Ran with only front_image connected, no back/left/right. Completed without error, produced valid GLB.
3. Front + back (2 views) — Ran with front_image + back_image only. Completed without error, produced valid GLB.
4. Resolution 512 — All 4 views, resolution=512. Completed without error.
5. Resolution 1024 — All 4 views, resolution=1024. Completed without error.
6. Resolution 1536 — All 4 views, resolution=1536. Completed without error, no OOM. (Note: the generator OOMs at 1536 on this image, but the refiner handles it fine — lighter memory footprint.)

Tests 2–6 ran in a single workflow: generation executed once, then 5 refiner branches ran serialized via Trellis2Continue gates sharing the same input trimesh. All 6 GLB exports (1 pre-refine + 5 refined) produced successfully.

Additionally, multi-view vs single-view quality comparison was done across 5 rounds of optometrist-style pairwise evaluation (MR Rounds 1–5). Multi-view refiner produces better fine detail in model recesses and reduced bilateral symmetry bleed compared to single-view.

🤖 Generated with Claude Code

[cuzelac]

This new node gives significant improvements over the single-view refiner when using the multi-vew generator node.

[bribblej-web]

your code does seem to improve MV, i had claude make it as a standalone node that you copy into the trellis folder after updating trellis, so you don't have to reintegrate it every time
, as of now its missing some of the newest changes like dino-lock but still working.
file is attached.
you also need to add this to the init.py
from .nodes_multiview_refiner import NODE_CLASS_MAPPINGS as _mv, NODE_DISPLAY_NAME_MAPPINGS as _mvd
NODE_CLASS_MAPPINGS.update(_mv)
NODE_DISPLAY_NAME_MAPPINGS.update(_mvd)
nodes_multiview_refiner.py