H3 Studio - Big Workflow Optimized for 12gb - 16gb vram users, i havent tested on lower Vram, i am pretty sure it should work if you are carefull with your resolutions.

The prompt writer is still WIP, so bypass that node for now

Everything you need to place in your comfy ui folder is in the ZIP file attached

• This Workflow is Optimazed For Speed and Quality combined, it uncludes optional upscaling runs, which you choose, if you are a heavy lora user, remove the load lora node with your preferable one,

• THis workflow is Optimized for both 20 steps regular runs 8 steps + Turbo lora runs and Turbo checkpoints run

• you can create infinate videos, please read the documentation trout,

on a 5070 TI a 25 Second Video on 1 MPX took me 11 minutes with 2x retries on one scene

Everything youneed in the Downloablefile including a guide

• it also includes a image edit workflow for H3 minimax as a bonus

Three video branches, integrated finishing, local prompt drafting, generation preview and a resolution selector. Model and node class names remain recognizable.

Open

Workflows/00_H3_Three_Branch_Studio.json: T2V, I2V and REF2V in one canvas.

Workflows/T2V_Production.json, I2V_Production.json, REF2V_Production.json: individual branch canvases with integrated finish controls.

Workflows/04_Chroma_H3_Image_Editing.json: public base + Chroma LoRA image editing.

Workflows/04b_Chroma_H3_Local_Merged_Editing.json: optional local merged Chroma variant.

Read first

Docs/Install_and_Downloads.md — node links, model links, folders and writer setup.

Docs/Studio_Operation.md — branch, one/two-pass and saved-take controls.

Docs/Resolution_Selector.md — aspect and megapixel controls.

Docs/Prompt_Writer.md — detailed write, preview, approve and apply instructions.

Docs/Chroma_Editing.md — source, masks and edit settings.

Docs/Release_Status.md — what was and was not validated.

Copy CustomNodes/h3_production_controls into ComfyUI/custom_nodes. Copy Examples image assets into ComfyUI/input. Install the linked third-party dependencies. Existing users with the backend already installed only need the frontend production.js update and a browser refresh for the resolution selector.

On the video canvas, choose a branch and click Go to selected branch. Review scene prompts and connected references before running. The review gate pauses after each generated scene: Approve & continue advances the loop; after the last approval, the selected finish can run. Model Preview Override supplies approximate in-progress previews; approve the decoded video instead.