An unofficial ComfyUI port of the FastH3 4-Step Preview LoRA.Sources<ul><li>Original LoRA (dense-datafree): <a target="_blank" rel="ugc" href="https://huggingface.co/FastVideo/FastVideo-FastH3-4-step-Preview-v1-LoRA">FastVideo/FastVideo-FastH3-4-step-Preview-v1-LoRA</a></li><li>Conversion recipe: taken from the metadata of <a target="_blank" rel="ugc" href="https://huggingface.co/lightx2v/Minimax-h3-Turbo/tree/main">lightx2v/Minimax-h3-Turbo</a></li></ul>Conversion recipe (as recorded in the source metadata):<pre><code>format = pt
source_format     = Diffusers PEFT LoRA
target_format     = ComfyUI generic LoRA
qkv_fusion        = block diagonal B; concat A; alpha multiplied by 3
training_rank     = 128
training_scale    = 1.0
training_alpha    = 128.0
swi_glu_mapping   = Diffusers [value;gate] -&gt; ComfyUI [gate;value]
base_model        = Comfy-Org/MiniMax-H3 minimax_h3_fl2va_bf16.safetensors</code></pre>Compatibility<ul><li>✅ I2V and T2V — working on the MiniMax H3 FL2VA model (I2V 1- and T2V 2-sample videos)</li><li>⚠️ Ref2VA — partially working, but loses significant prompt adherence; an official release is recommended</li></ul>Examples are made on default minimax workflow, 4 steps, <a target="_blank" rel="ugc" href="https://github.com/Larryvrh/ComfyUI-MiniMax-H3-Turbo">Larryvrh turbo sampler</a>8ish steps making sound better in my own experience. Workflows are imbedded in the videos.CreditsAll credit for the original model and the conversion recipe belongs to the original authors:<ul><li>FastVideo: <a target="_blank" rel="ugc" href="https://github.com/hao-ai-lab/FastVideo">https://github.com/hao-ai-lab/FastVideo</a></li><li>MiniMax-H3-Turbo: <a target="_blank" rel="ugc" href="https://github.com/ModelTC/Minimax-H3-Turbo#model-specs">https://github.com/ModelTC/Minimax-H3-Turbo#model-specs</a></li></ul>This conversion is an independent, unofficial effort and is not affiliated with, endorsed by, or sponsored by FastVideo, lightx2v, or ModelTC. Right now I know about an experimental checkpoint by Kijai, would love to hear the difference from users. <a target="_blank" rel="ugc" href="https://huggingface.co/Kijai/MiniMax-H3-experimental/tree/main">https://huggingface.co/Kijai/MiniMax-H3-experimental/tree/main</a>

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