Nynxz H3
MiniMax H3 for ComfyUI: one drag-and-drop input node covering t2va/fl2va/ref2va, plus step caching, partial decode and profiling.
Nodes (33)
Grey Box Render Is a Queue Job, Not a Node You Wire
Block the Shot Before You Spend a Single H3 Render
A Whole 3D Editor Hiding in a Node With No Outputs
Just the soundtrack — H3 Audio as a standalone reference
Skip the stack when nothing changed
Setting H3's canvas
A CLIP LoRA loader for graphs that have no model
Pull one frame out of a video latent without decoding the whole clip
Skip the transformer blocks that aren't pulling their weight
Give the last percent of the denoise its own steps
H3 Is a Video Model — H3 Edit Turns It Into an Image Editor
The node that replaced two stock H3 nodes
Read the canvas back as numbers, not as a report string
A reference that was generated, not loaded
Several H3 references on one node — no spaghetti
Cut a latent down to the frames you actually want
Let the references stop watching the noise
Strip the chat off the rewriter's answer
Turn a one-liner into a proper H3 prompt, inside the graph
An illegal memory access' on long clips
The sampler that spends your steps where the error actually is
Video speed that scales past 5 seconds
Reference video, soundtrack attached — and don't lie about fps
Six Style Images, One <Picture>, and No Competing References
Pixels vs Meaning
The Reference Node That Actually Reads Your Roles
One Node That Holds Your Entire Film
The Node That Makes Two Scenes Look Like One Take
Your Film So Far — Joined Without Rendering Anything
Crossfade the Continuations, Leave the Cuts as Cuts
Six Wires Out of One Scene, and the Noise Is the Interesting One
A Wire From Inside the Loop Would Be a Cycle, So It Doesn't Have One
Everything the Studio Needs, Squeezed Onto One Wire
Make short films with MiniMax H3 in ComfyUI. Write the film as scenes, block it out in 3D, keep your characters and places in one place, and render the whole thing in one queue.
H3 Studio
One node holds the whole film. Each scene is one H3 generation (about 5–15 seconds); its
shots are the beats inside it. Mention a reference as @counter and the studio writes it into
H3's prompt for you; give a line to a character and they say it.
- Pictures, videos and audio as references, each used only in the scenes that need it
- Dialogue with a voice per character
- Scenes that flow into each other, carrying the last frames and sound across the cut
- Render the whole film, one scene, or only what changed — unchanged scenes reuse their last clip
Grey Box Studio
Block a scene before you spend a render on it: a set made of simple shapes, characters walking between marks, and a camera for each shot. The grey video goes into H3 Studio as a blocking reference, so H3 keeps the layout and camera move while the look comes from your other references.
The Codex
Your show's bible: every character, place and prop once, with its pictures, a description, a voice
and LoRAs. In H3 Studio, the References tab's Fill from Codex button fills a film's @references from it by name.
Example workflows
Drag the picture onto ComfyUI to open the workflow, or find it in ComfyUI's Templates under this pack. Its note lists every model it needs and where to get them.
H3 Studio: a two-scene film rendered in a loop, with the shot writer wired up.
<img src="example_workflows/H3%20Studio.webp" alt="The H3 Studio workflow">Install
cd ComfyUI/custom_nodes
git clone https://github.com/Nynxz/ComfyUI-NynxzH3Studio
cd ComfyUI-NynxzH3Studio
pnpm install && pnpm build
Then restart ComfyUI. You need ComfyUI 0.30.0 or newer and the H3 models. Optional: ZenKit for pop-out windows, and ComfyUI-NynxzNodes for LoRA lanes. Saved workflows from NynxzNodes or NynxzH3 load unchanged.
More
- H3 Studio — the editor, references, continuations and rendering the film in a loop
- Grey Box — the editor, the file format, agent tools and the command line
- Building blocks — the lower-level H3 nodes: conditioning, prompts, faster sampling, partial decoding
- Writing scripts with an agent — the script format an LLM can write and the studio can paste in
The art in these screenshots is from Neon After Midnight. The code is MIT licensed.