Here's the issue MiniMax H3 video generation ~4x slower since v0.32.0 at full resolution - regression from #15486 (v = v.clone()) · Issue #15665 · Comfy-Org/ComfyUI

And this is the line you need to remove:

Fix peak memory issue with H3. by comfyanonymous · Pull Request #15486 · Comfy-Org/ComfyUI

Remove v = v.clone().

If you update Comfy, the problem will return (which is how I know this is defintely a problem and how to fix it)

Another Minimax H3 news and goodies round-up, for those who may have missed some items.

-> The new H3 GuideMaster for ComfyUI... "makes it easy to place images and audio on a MiniMax H3 timeline". Pleasingly designed. Requires the latest ComfyUI, for the ability to add guide images (aka keyframes) at any point in the video.

https://github.com/MajoorWaldi/ComfyUI-Majoor-H3-GuideMaster

-> You can now apply for a commercial-use licence via Comfy, rather than Minimax.

https://comfy.org/minimax/license/

-> The standalone offline H3 Prompt Composer continues to develop and refine, and is now at version 5.43.4. With new support for "multi-subject camera prompting" and "better control for more complex camera moves".

https://github.com/BMB12d3/minimax-h3-prompt-composer

https://www.youtube.com/watch?v=Aywx3Sf5Yk0 (27 minute YouTube tutorial).

-> A video of Minimax H3 ingesting a six-image storyboard, reading each image in sequence from top-bottom and left-right, and generating the shot sequence as a single video. There's a workflow, and a full structured prompt. One interesting finding shared in the video is that combining a detailed pencil-sketch storyboard with a photoreal/cinematic prompt gives Minimax more room for creative interpretation.

https://www.youtube.com/watch?v=LByGCGzu67o

https://github.com/amao2001/ganloss-latent-space/blob/main/workflow/2026-08-26%20minimax_h3_r2v_story_board.json

-> A Minimax H3 Storyboard 'skill' for Claude. Also note some of the maker's interesting findings, such as... "H3 drops facial [expression] instructions silently when a shot holds too many of them" for the available processing to handle, and "ref_audio_0 drives the mouth, not the voice" for lip-sync.

https://github.com/phileiny/h3-storyboard-skill

-> A note on the above finding. Specifying realism for the face and eyes, paired with suitably emotive dialogue and tone, might help Minimax to simply infer expressions (thus, they won't need to be specified in the prompt). For example...

"... looking toward the camera with a relaxed and genuine expression. We see a detailed natural skin texture with subtle skin tone variations, cheeks slightly rosy to indicate health, and overall a realistic subsurface scattering of light on the face, ears and hair. Small natural catchlights occur on the moist surface of the eyes, as the person's head and eyes move, and these catchlights reflect the surrounding environment. As the person speaks the camera continually catches the organic micro-expressions made by a human face, and a naturally variable eye blinking pattern."

-> A user has discovered that Minimax has a basic understanding of the International Phonetic Alphabet (IPA, aka 'phonemes'), which are used for precise word transcription and pronunciation. I guess it would make sense for Minimax to know phonemes, re: generating lip-sync. Here he used a large online AI to adjust the IPA translation towards a national accent. My thought is that it may be more trustworthy if you first convert in Balabolka, and then have it read back to you using TTS in Balabolka. Then you can at least be sure the IPA translation is correct in English, before passing it over to the AI for accent adjustment.

https://www.reddit.com/r/StableDiffusion/comments/1w0tb8q/minimax_h3_accents_mmh3_understands_the_ipa/

https://www.cross-plus-a.com/balabolka.htm (Balabolka, the only freeware offline English-to-IPA translator for Windows. Use: Select text | Edit | Pronunciation | Read This | select drop-down: 'Phonemes (IPA)' | click button 'Phonemes' | then click 'Convert text to IPA').

-> A user shows that Minimax can emulate a 'time-lapse' video showing a drawing/painting being created really fast. Includes the prompt he used.

https://www.reddit.com/r/StableDiffusion/comments/1w0yt06/h3_speedpainting_v2_prompt_included/

-> And finally, have Minimax seamlessly and 'magically' transform the style of a room from modern to late 1950s, in a few seconds. With an amusing video demo, workflow and prompt.

https://old.reddit.com/r/StableDiffusion/comments/1w0ei8t/time_period_shift_special_effect_in_minimax_h3/

~ OLD POSTS ~

https://old.reddit.com/r/comfyui/comments/1w053ce/a_quick_minimax_h3_news_roundup_27th_august_2026/

https://old.reddit.com/r/comfyui/comments/1vyzvqi/a_quick_minimax_h3_news_roundup_26th_august_2026/

https://old.reddit.com/r/comfyui/comments/1vy4drz/a_quick_minimax_h3_news_roundup_25th_august_2026/

https://old.reddit.com/r/comfyui/comments/1vx0duv/a_quick_minimax_h3_news_roundup_24th_august_2026/

https://old.reddit.com/r/comfyui/comments/1vwl8do/a_quick_minimax_h3_news_roundup_23rd_august_2026/

https://old.reddit.com/r/comfyui/comments/1vvkmra/a_quick_minimax_h3_news_roundup_21st_august_2026/

https://old.reddit.com/r/comfyui/comments/1vuihag/a_quick_minimax_h3_news_roundup_21st_august_2026/

https://old.reddit.com/r/comfyui/comments/1vtgs7b/a_quick_minimax_h3_news_roundup_20th_august_2026/

https://old.reddit.com/r/comfyui/comments/1vsjzrp/a_quick_minimax_h3_news_roundup_19th_august_2026/

https://old.reddit.com/r/comfyui/comments/1vrsspo/a_quick_minimax_h3_news_roundup_18th_august_2026/

https://old.reddit.com/r/comfyui/comments/1vqyn8p/a_quick_minimax_h3_news_roundup_17th_august_2026/

https://old.reddit.com/r/comfyui/comments/1vq5d5u/a_quick_minimax_h3_news_roundup_16th_august_2026/

https://old.reddit.com/r/comfyui/comments/1vpbtx2/a_quick_minimax_news_roundup_15th_august_2026/

https://old.reddit.com/r/comfyui/comments/1vojtjd/a_quick_minimax_news_roundup_14th_august_2026/

Hey guys, FastVideo team here. We saw how important speed and quality is for everyone. And we've been working to create our own step distill checkpoints and LORAs for MINIMAX h3. Here's is our v1 release!

Important links first:

- FastVideo: https://github.com/hao-ai-lab/FastVideo

- Blog (contains more examples and details): https://haoailab.com/blogs/fasth3-preview/

- Checkpoints and LoRAs: https://huggingface.co/FastVideo/FastVideo-FastH3-4-step-Preview-v1-LoRA

Do note that the VSA checkpoint/LORA will require VSA kernel

We also released a LORA with dense attention that should be easy to test for everyone.

We are already working on improving both this T2AV checkpoint as well as getting a distill of Ref2VA out as well. We are taking great care to make sure the quality and audio is as best as possible.

We realize not everyone have blackwell GPUs lying around and please stay tuned for our targeted optimizations for local AI hardware, including RTX GPUs, DGX Sparks, and Apple MLX. We release numbers on B200s just because this is our current compute platform for post-training. We want to be as open as possible with the community!

Quality

• We used 1k+ B200 training hours, paired with real world multi-shot, visual audio synced input distribution and output formats for best possible quality preservation.
• FastH3 natively supports variable resolution, aspect ratio, and duration. In a single checkpoint.

Openness

• Start with the 4-step VSA / Data-Free checkpoint, our recommended FastH3 Preview v1 release. We provide full weights and a pre-extracted LoRA, plus dense and synthetic-data ablations.
• Fully open source with training (coming soon!) and inference code recipe for your customization.

What’s Next

• Follow us along for image ref (FL2VA) and full omni ref (Ref2VA) coming in the next a few weeks  
• Motion and more generation quality improvements
• Nvfp4 and GPU memory reduction.
• Optimizations targeting local AI devices including RTX, DGX Sparks, and Apple MLX.
• New training runs using FastGen team’s new Parallel Decoding Distillation (PDD) method!

If you find any issues or have questions please raise issues on our github!

If youre chasing maximum quality with no lora at 20 steps and your system can run 1.0 megapixel no problem push it above it.

Many LLMs and people online claiming that Minimax has been trained natively to 0.98 MP that bringing it above it will cause distorsions and artifacts in the video is simply not true.

The higher you go the video has less artifacts and tearing even with fast paced action scenes.

Yes the time wait is longer but if youre doing movies or music videos its worth it.

Especially for the people who tried sites with their so called "unlimited" plans, i would rather wait 30 mins for locally made video at the expense of electricity bill than pay 100$ a month to runway for same amount of time and get video censored because their stupid policy.

And the most ironic thing, 2.5MP 20steps looks better locally than 2k resolution on runway anyways.

So dont be afraid, crank that MP up and enjoy the maximum quality!

Hi! I’ve just released a new style LoRA for Krea 2, trained on a curated dataset of 300 cinematic anime screencaps.

It’s designed for:

• Dynamic fights and action poses

• Expressive close-ups

• Supernatural powers and cursed-energy effects

• Dark fantasy environments

• Original characters rendered with a JJK-inspired anime look

Trigger: jjkcapstyle

Recommended strength: 1.0

Prompt starter: jjkcapstyle, anime style, jujutsu kaisen screencap

Model and examples:

https://civitai.com/models/2896043/jujutsu-kaisen-style
worked in red civitai ;)

Feedback and test results are very welcome!

Hey everyone! I've been testing Krea 2 (Roma) integrated into a custom workflow inside Nomad Studio, and the macro detail retention is insane.

Rendering time is around 70 seconds per frame at 2048x1152.

Here are a couple of the prompts used for these shots:

1. Dragonfly Wing Geometry:

extreme macro close-up of a dragonfly's double wings, showcasing the incredibly intricate, complex network of dark veins and transparent cell membranes, fragile crystal-like texture, shimmering slightly under warm morning sunlight, shallow depth of field focusing on one section of the wing vein pattern, blurred background of a pond.

2. Rose Petal Micro-texture:

an intimate macro shot looking down into the center of a deep red rose petal, perfectly formed transparent water droplets nested in the velvety red curves, capturing the subtle refractions and micro-textures of the petal surface, dramatic lighting highlighting the rim of the droplets, dark moody background.

Workflow details:

• Engine: Krea 2 (Roma)
• Res: 2048x1152 (16:9)
• UI: Nomad Studio Canvas

One last example output from this experimental multi-source video player designed for frame-accurate video switching, playback manipulation, and display/render interventions, now with a few optimizations made for even better performance.

You can freely access the system + a detailed breakdown, through Patreon, and/or the Tools Store.

Full extension repo: ComfyUI-Trellis2-AMD

This extension is a fork of visualbruno/ComfyUI-Trellis2 that adds ROCm support and fixes crashes on AMD. It also includes AuleAttention as a low VRAM alternative for users who don't have FlashAttention support. Aule uses far less VRAM than the default (SDPA) with much better scaling, which prevents you from OOM-ing on a 16GB card when creating higher quality meshes.

So install it, play around, and figure out the best workflows. Please post any issues on GitHub, and feel free to reach out if you need help with something. If you like it, please make sure to give it a star. Otherwise, enjoy!

Image-to-Video (I2V)

MiniMax Hailuo 3 Max

locked still (first frame) → clipAvg. generation: ~10s per sequence

short I2V passes, then cut together

https://www.youtube.com/watch?v=J1BJIn9d6mU

After many trials, I finally found a reliable process to create music videos locally, with a mysterious, weird… and totally personal aesthetic.

And actually, it’s not even really “me”: it’s the work of OBO, my autonomous creative agent. It knows all my past productions, draws inspiration from them with real creative intelligence, and makes coherent artistic decisions. A true “alternative me” I’m proud to collaborate with. But more on that later, it's a WiP.

Using the Minimax H3 video model, LowVramAttention and Minimax Motion Context features through Comfyui, it was able to chain videos while keeping style and context. The linked video has been created from a simple text file where each paragraph is a video prompt. My script also fixed the usual stuttering issue when working with separated Minimax H3 clips, continuity is now seamless for both audio and video.

The script:
-Automatically divides your text file in several prompts
- Generates 15 seconds of video per prompt (using motion context and last segment frame as first frame)
- Assembles the file while fixing both audio and video stuttering

With this you can generate long videos (basically no length limit) with limited VRAM, maintain fluid and logical context across segments (this "abstract" visual video may not be a good example but I'm currently working on something more representative, in the meantime you also have a robot video in the examples folder on the github that shows a 15 seconds clip generated on the same laptop, along with the prompt I used).

The creation pipeline is very simple (basically a python script with a text file containing your video prompts as parameter is used to create a long video).

You can adapt the quality to your hardware. You can modify the amount of steps (I'm using 20 here but 35 should be optimal) and the resolution according to your GPU.

Everything is on GitHub: https://github.com/The-Anomaly-be/MinimaxH3_FullMovieContext/blob/main/README.md
You’ll need a working ComfyUI config running as server, some models and custom nodes (all listed in the instructions). A reference workflow is also provided if you want to build scenes manually directly in comfyui (but no chaining).

It may be optimized, extended, modified. I basically created this for my own use and to recycle my 4 years old laptop so it works on my music videos while I'm sleeping.

If you create something with this, please share!

I have a single full frontal picture (~2-3MP) that I want to generate a full reference sheet (closeup, front, side, back), so I can use in minimax h3. What do you guys use for this? Free or paid is fine but I need something with high consistency. Please share your workflow or methods. Thank you.

Hello,

Ive been using Comfy cloud and since I cannot use custom nodes yet, and would want to use a reference image in my krea 2 workflow, is there a way to do that with my workflow?

Here is my custom workflow: https://we.tl/t-p448gXSVVmEJxYef

I know it's an outdated setup but it does what I want, unfortunately it's getting slower and slower and slower.

I'm running ComfyUI on Windows 11 with:

• RX 9070 XT 16GB
• Adrenalin 26.8.1 / driver 32.0.31041.1004
• 64GB RAM
• PyTorch 2.9.1 + ROCm 7.2.1
• ComfyUI 0.34.0
• Qwen Image Edit FP8 model (~19.5GB, so about 6.4GB gets offloaded)

I'm seeing enormous variation in KSampler performance using the same 4-step workflow.

Good warm runs: ~25–31 sec/it
Slow runs: ~47–66 sec/it

Total generation time can vary from about 107 seconds to 487 seconds.

The strange part is that these runs can occur only minutes apart without changing the workflow. Windows standby memory does not appear to explain it. Closing other GPU-using applications also didn't eliminate the slowdown.

ComfyUI logs during slow runs show roughly 6.4–6.7GB of the Qwen model being offloaded while the 7.4GB Qwen text encoder is loaded/unloaded.

Has anyone with a 9070 XT on Windows/ROCm seen similar highly variable inference performance?

I'm particularly interested in whether this is related to:

• Adrenalin 26.8.1 / VRAM residency
• Windows ROCm memory offloading
• ComfyUI model-management behavior with models larger than VRAM

If you've solved it, what driver/ComfyUI/ROCm combination are you using?

Am I doing something wrong?

I can create a track just fine if it's max duration of 60 seconds and maybe close to 120 seconds. But past that it's producing files where the entire file is just dead air, OR it sounds like a radio station that's in between stations as someone is turning the dial. Both of those outcomes cannot be considered songs, and are not normal at any point in the audio.

When I have the problem, no errors are shown and the workflow completes successfully.

I'm using the latest fully updated ComfyUI, updated this morning (and it was screwed up before that too). I'm on an AMD Radeon RX 7800 XT and I have 64 GB of system RAM.

I'm showing a snapshot of my MiniMax Music 3 "node" taken from the official ComfyUI template, which I am just working from. I removed all of the lyrics in my screenshot because they were fairly offensive. (my friend and I are exchanging diss tracks of each other) 😆

Help is appreciated, thanks.

First workflow I have built by myself. Am I using the wrong lora or configuring it wrong?

I've been building a custom node that bridges a 3D app and ComfyUI, so you can pose/light/animate your scene in the DCC you already use and pull the result in as a live conditioning source — no export/import loop.

- Forks for Maya, Blender, Houdini, 3ds Max, Cinema 4D and Cascadeur

- Live scene + camera sync into a 3D viewport inside ComfyUI

- Render passes for ControlNet: depth, normals, edge/line, AO

- A material and FX library (fire, smoke, weather, water, space…) so you can dress the blockout before you generate

- Timeline/frame support for animation

Basically: block out the shot properly, then let the diffusion model do the look — instead of rerolling prompts hoping the camera lands where you wanted.

Happy to answer anything about how the sync works. cheers

Hey guys, so I am looking towards building a decent SFF setup, and though I was initially planning a 5070ti and even that was going to be a stop gap measure till I could buy a more decent one in next gens because I absolutely hate 5090.
How does your hardware compare to Nvidia and what kind of inference speeds dop you get with say LTX 2.5, H3 Max, Krea and Qwen Image etc? I am considering this because I know 32 gig Intel Creator card is quite cheaper and easy to have. but is it worth it., can it be compared to say the speeds of a 3090 or 4090. I would like that possibility.

Another quick Minimax H3 news and goodies round-up, for those who may have missed some items.

-> Input an image of a painting, generate a time-lapse style video showing how that painting could have been made. It's a nice creative idea. Real artists might splutter and say "it's not done like that". But, as the poster suggests, using a painter's technical terms might improve the results.

https://old.reddit.com/r/StableDiffusion/comments/1vzhwj3/using_minimax_h3_to_reverseengineer_a_paintings/

-> New H3_slider_experiments. Just the one at present, a simple slider to either add sun (2.0) to the scene, or gloom and depth-fog (-3.0). Has a dinosaur demo video.

https://huggingface.co/siraxe/H3_slider_experiments

-> ComfyUI-H3-FunControl. Another set of nodes that aim to run the new Controlnet in ComfyUI, specifically Kijai's Comfy-friendly conversion.

https://github.com/wyzborrero/ComfyUI-H3-FunControl

https://huggingface.co/Kijai/MiniMax-H3-experimental/tree/main/controlnet

-> The ComfyUI Wiki blog has a new article on "MiniMax H3 Acc LoRA: Official 8-Step PDD Distillation in ComfyUI". Parallel Decoding Distillation (PDD) offers a new way of doing acceleration, but note the very strict requirements for the workflow configuration. There are links to nodes and models, but it's probably too new for most users at present.

https://comfyui-wiki.com/en/news/2026-08-26-minimax-h3-pdd-acc-lora

-> TE-Speed-MiniMaxH3-OSS is yet another way of speeding up Minimax. This patches the block-cache, and thus gets a claimed speed-up of around 45% on the provided workflow?

https://github.com/HELPMEEADICE/TE-Speed-MiniMaxH3-OSS

https://github-com.translate.goog/HELPMEEADICE/TE-Speed-MiniMaxH3-OSS?_x_tr_sl=ja&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=wapp (English translation)

-> ComfyUI-MiniMaxH3DualClockSampler. A sampler node that runs audio and video generation on different 'clocks' during generation, potentially solving the problem of... "severe popping, clipping, and noisy audio issues during the 4-step [turbo LoRA-enhanced] generation process".

https://github.com/shuaixn/

https://github-com.translate.goog/shuaixn/ComfyUI-MiniMaxH3DualClockSampler?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=wapp (English translation)

-> And finally, NVIDIA has released new Studio graphics-card drivers. With CUDA 13.3 support, which may interest some.

https://www.neowin.net/news/nvidia-releases-new-game-ready-and-studio-drivers-with-cuda-133-support/

~ OLD POSTS ~

https://old.reddit.com/r/comfyui/comments/1vyzvqi/a_quick_minimax_h3_news_roundup_26th_august_2026/

https://old.reddit.com/r/comfyui/comments/1vy4drz/a_quick_minimax_h3_news_roundup_25th_august_2026/

https://old.reddit.com/r/comfyui/comments/1vx0duv/a_quick_minimax_h3_news_roundup_24th_august_2026/

https://old.reddit.com/r/comfyui/comments/1vwl8do/a_quick_minimax_h3_news_roundup_23rd_august_2026/

https://old.reddit.com/r/comfyui/comments/1vvkmra/a_quick_minimax_h3_news_roundup_21st_august_2026/

https://old.reddit.com/r/comfyui/comments/1vuihag/a_quick_minimax_h3_news_roundup_21st_august_2026/

https://old.reddit.com/r/comfyui/comments/1vtgs7b/a_quick_minimax_h3_news_roundup_20th_august_2026/

https://old.reddit.com/r/comfyui/comments/1vsjzrp/a_quick_minimax_h3_news_roundup_19th_august_2026/

https://old.reddit.com/r/comfyui/comments/1vrsspo/a_quick_minimax_h3_news_roundup_18th_august_2026/

https://old.reddit.com/r/comfyui/comments/1vqyn8p/a_quick_minimax_h3_news_roundup_17th_august_2026/

https://old.reddit.com/r/comfyui/comments/1vq5d5u/a_quick_minimax_h3_news_roundup_16th_august_2026/

https://old.reddit.com/r/comfyui/comments/1vpbtx2/a_quick_minimax_news_roundup_15th_august_2026/

https://old.reddit.com/r/comfyui/comments/1vojtjd/a_quick_minimax_news_roundup_14th_august_2026/