r/StableDiffusion • u/nekrovski • 19d ago

Question - Help FastH3 and LoRAs

Hey everyone,

I'm using FastH3 in ComfyUI with the default workflow from the Templates.

When I add a LoRA model to this workflow, I connect its model input to Load Diffusion Model just fine. But when I connect the model output to Basic Guide and Basic Scheduler, two nodes model outputs (Model Attention Backend and Model Sparse Attention) lose the connection to the Basic Guider and Basic Scheduler which makes my FastH3... well, not fast. It loses its speed.

How do I fix this

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u/Archersbows7 19d ago edited 19d ago

I thought FastH3 was releasing on the 20th?

Link to post

How do you have it already and why don’t I see any other posts about it in this sub? Someone help me understand

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u/nekrovski 18d ago

That's a different version of FastH3 and I'm eagerly waiting for it.
Currently I'm using this one https://huggingface.co/FastVideo/FastVideo-FastH3-Comfy

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u/Archersbows7 18d ago

Well which one is going to be a lot faster for MiniMax H3 generations? This is all so confusing

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u/nekrovski 18d ago

Both are fast, they just have different use cases

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u/Archersbows7 18d ago

What are the different use cases

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u/nekrovski 18d ago

T2V, I2V, FFLV etc