UltraWan LoRA — ComfyUI Conversion (Unofficial)

This lora only works with the T2V 1.3b model, it does not work with the 14b. The 4k model has some problems, but the 1k model works well.

This repository contains converted LoRA weights from the official APRIL-AIGC/UltraWan release.
The only modification made was converting the .ckpt / original format into .safetensors compatible with ComfyUI.
No training, fine-tuning, or architecture changes were performed.

📌 What This Is

✅ Direct conversion of original UltraWan LoRA weights to ComfyUI-compatible safetensors format
❌ Not trained, modified, or altered in any way beyond the format change
🎯 For users who want to test UltraWan LoRA with ComfyUI’s Text-to-Video pipelines

🔗 Attribution

Original Model: APRIL-AIGC/UltraWan
Base Model Architecture: TencentARC/Wan
License: CC-BY-4.0 with Additional Restrictions (see below)

I do not claim ownership of the original model, dataset, or LoRA weights.
All credit goes to the APRIL-AIGC team and the authors of the UltraVideo Dataset.

📄 License & Use

These weights are subject to the license terms of the UltraVideo Dataset, which include:

❗ Non-commercial research only
⚠️ No redistribution of raw videos or identifiable content
✅ You may use these weights to run inference in ComfyUI for research/academic purposes
❌ You may not use these weights or outputs for commercial purposes, product development, or monetization

Please see the full license in LICENSE.

🔧 Recommended LoRA Strength

LoRA Version	Recommended Strength
`ultrawan_1k`	0.25
`ultrawan_4k`	0.5

You may experiment with different values, but these are the recommended starting points for best results.

📂 Contents

File	Description
`ultrawan_1k_comfy.safetensors`	LoRA converted to safetensors, ready for ComfyUI
`ultrawan_4k_comfy.safetensors`	LoRA converted to safetensors, ready for ComfyUI
`LICENSE`	UltraVideo Dataset License (CC-BY-4.0 + Restrictions)
`README.md`	This file

🧩 How to Use in ComfyUI

Place the .safetensors file in:

ComfyUI/models/loras/

Then use a LoRA Loader node in your workflow and select the LoRA file from the dropdown menu.

This is a community-contributed format conversion. All rights belong to the original creators.

Alissonerdx
/

UltraWanComfy