| --- |
| license: apache-2.0 |
| tags: |
| - comfyui |
| - diffusion_single_file |
| --- |
| |
| Original repo: |
|
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| https://huggingface.co/lightx2v/Wan2.2-NVFP4-Sparse |
|
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| LightX2V's NVFP4 → Comfy NVFP4, same datatype, different conventions: |
|
|
| - Nibble swap on U8 weights — Comfy's store_fp4x2 reverses NVIDIA-spec packing |
| - weight_scale correct as it is |
| - weight_scale_2 = alpha × input_global_scale — LightX2V stores a CUTLASS post-matmul rescaler, Comfy uses the divisive per-tensor scale |
| - input_scale = 1 / input_global_scale — same convention flip |
| |
