Introducing: MINIMAX H3 | EZ WF

UPDATE: The workflow has been completely redone on 08/08/2026. if you previously downloaded and it didn't work for you, try now. i have tested in a fresh install, it works, if you are having issues you most likely don't have the most up to date version on Comfy from the branches. do NOT use the releases version, it will not work. Also be sure to update all of the nodes correctly, pull them from github. Check your console for any missing dependencies like sage-attention etc and install them. i will no longer be responding to any issues regarding node pack issues, you just don't have the updated versions or you have something in your setup that conflicts.

a custom workflow for Minimax's H3 video model. Its not too different to the base one Comfy provides, just has some little tweaks that i like to use, including Sage Attention/Easy Cache Patch.

NOW HAS BOTH FLF2V AND REF2V.

This workflow is my personal workflow that I use for all of my Minimax H3 stuff, it may not be to everyone's taste but it works well for me and I'm sure others may find it useful.

Generated a 5 second clip with 0.6MP at 16:9 in 6:32 on an RTX 3060 12GB/32GB Sys RAM using this WF. base workflow was more than double that time.

The workflow uses the most optimal boosters there are right now (all optional, you can just run without them)

Works on 12GB VRAM + 32 GB System RAM. not tested on anything below.

INCLUDES:

• 3 Ref Images | 2 Ref Audio | 1 Ref Video

• Sage Attention Patch (For Lower VRAM Use)

• Block Cache & Sol-Attn with Optimised Settings

• Bob INT8 Loader (Faster INT8 Loading)

• LTX Refiner

• RTX Upscaler

• ITV/T2V/RTV Modes

Nodes Needed:

[Bob INT8](https://github.com/BobJohnson24/ComfyUI-INT8-Fast)

[Sol-Att](https://github.com/kijai/ComfyUI-SolAttn_triton)

[BlockCache](https://github.com/T8mars/comfyui-minimax-h3-blockcache-T8/tree/main)

[KJNodes](https://github.com/kijai/ComfyUI-KJNodes)

[rgthree](https://github.com/rgthree/rgthree-comfy)

[EasyUse](https://github.com/yolain/ComfyUI-Easy-Use)

[VHS](https://github.com/Kosinkadink/ComfyUI-VideoHelperSuite)

[RTX Upscaler](https://github.com/Comfy-Org/Nvidia_RTX_Nodes_ComfyUI)

[LTXVideo](https://github.com/Lightricks/ComfyUI-LTXVideo) - Optional

Models Needed:

[REF MODEL]

[FLF MODEL]

[TE]

[AUDIO VAE]

[VIDEO VAE]

TURBO LORAS:

[LIGHTx]

[LARRY 600]

Troubleshooting:

I'm missing the LTX Nodes and i get this error, what do i do?

ImportError: cannot import name 'pad' from 'kornia.geometry.transform.pyramid' (G:\StabilityMatrix-win-x64\Data\Packages\ComfyUIClean\venv\Lib\site-packages\kornia\geometry\transform\pyramid.py)

-- downgrade Kornia in python packages to 0.8.2

The RTX Nodes are missing, even though i have them installed?

Go to your python packages and install: nvidia-vfx

I'm missing MiniMaxH3MemoryEfficientSageAttentionPatch

Update KJNodes through Github (go to your custom_nodes folder and open a git bash and type: git clone https://github.com/kijai/ComfyUI-KJNodes.git

Kofi: https://ko-fi.com/mrweaz

Disclaimer: I hold no liability for any images produced, including their legality, ethical implications, or potential misuse. By using this model, you agree that all responsibility for generated content rests solely with you. Use responsibly and within legal boundaries.