> ## Documentation Index
> Fetch the complete documentation index at: https://docs.comfy.org/llms.txt
> Use this file to discover all available pages before exploring further.

# ComfyUI MiniMax H3 Prompt Guide: Official Guides, Tips, and Prompt Embeddings

> Write better MiniMax H3 prompts in ComfyUI: MiniMax's official prompt writing guides, general prompting tips, and community prompt embeddings for style effects.

The prompt is where H3's multimodal training pays off: shots, camera moves, dialogue, and sound effects all live in one prompt block. This page collects the prompt writing resources for MiniMax H3 in ComfyUI: MiniMax's official guides, general tips that apply to every workflow, and prompt embeddings for style effects.

## Official guides

MiniMax publishes two official prompt writing guides:

* [Base generation modes](https://huggingface.co/MiniMaxAI/MiniMax-H3/blob/main/docs/VIDEO_PROMPT_WRITING_GUIDE_base_en.md) (T2VA, I2VA, FL2VA, L2VA): structure a prompt into timed shots with camera movement and audio (dialogue, SFX, music), with examples for each mode
* [Full-reference mode](https://huggingface.co/MiniMaxAI/MiniMax-H3/blob/main/docs/VIDEO_PROMPT_WRITING_GUIDE_ref_en.md) (R2V): the rewrite output structure, including subject definitions, reference labels, and retention analysis, and how to assign each reference a role in the target shot

MiniMax also publishes installable [H3 skills](https://github.com/MiniMax-AI/MiniMax-H3/tree/main/skills), including a prompt-writing skill that packages these guides for agent use.

The workflow pages show these guides applied to each template: [T2V and I2V](/tutorials/video/minimax/minimax-h3-native), [R2V](/tutorials/video/minimax/minimax-h3-native#minimax-h3-reference-to-video-r2v), [Multiframe Reference](/tutorials/video/minimax/minimax-h3-multiframe#prompt-writing-guide), and [Fun ControlNet Union](/tutorials/video/minimax/minimax-h3-fun-controlnet#prompting-tips).

## General tips

1. **Describe the whole scene**: State the overall scene first (location, character, what is happening), then break it into timed shots
2. **Shots, camera, and audio**: Describe the shots, camera moves, and the accompanying audio (dialogue, SFX, music) in one prompt block
3. **Resolution**: H3's native canvas is a 768px short edge, which is 1344x768 at 16:9, and resolutions are rounded to a multiple of 32. See [Setting the output resolution](/tutorials/video/minimax/minimax-h3#setting-the-output-resolution)
4. **Duration**: The duration input snaps to the model's 17-frame-per-block (17k+5) grid at 24fps

Workflow-specific prompting (reference tags, timeline anchors, control-video length) is covered on each workflow page.

## Prompt embeddings

[Comfy-Org/ComfyUI#15697](https://github.com/Comfy-Org/ComfyUI/pull/15697) added support for prompt embeddings in MiniMax H3. You can use ComfyUI's standard `embedding:` syntax in H3 prompts.

Place an embedding file in `ComfyUI/models/embeddings/` and reference it in the prompt by name, for example `embedding:my_embedding`. The embedding is loaded and mixed into the text conditioning just like with any other ComfyUI model.

The [Comfy-Org/MiniMax-H3](https://huggingface.co/Comfy-Org/MiniMax-H3/tree/main/embeddings) repository hosts 10 style embeddings in its `embeddings` folder. These files are unofficial: they were contributed by community member [silveroxides](https://huggingface.co/silveroxides) via [Hugging Face PR #50](https://huggingface.co/Comfy-Org/MiniMax-H3/discussions/50), and were not produced by Comfy-Org or MiniMax. The original files are in the [silveroxides/MiniMax-H3\_tests](https://huggingface.co/silveroxides/MiniMax-H3_tests/tree/main/embeddings) repository. The file name describes the intended effect, and the trigger word is the file name without the extension:

| Embedding                    | Effect (by name)          |
| ---------------------------- | ------------------------- |
| `minimaxh3_art_is_explosion` | Explosive art composition |
| `minimaxh3_blooming_flowers` | Flowers blooming          |
| `minimaxh3_bullet_time`      | Bullet-time effect        |
| `minimaxh3_dark_magic`       | Dark magic atmosphere     |
| `minimaxh3_fire_breath`      | Fire-breath effect        |
| `minimaxh3_four_seasons`     | Four seasons transition   |
| `minimaxh3_kiss_camera`      | Kiss scene camera move    |
| `minimaxh3_spiral_ascent`    | Spiraling ascent          |
| `minimaxh3_storm_magic`      | Storm magic               |
| `minimaxh3_truman_show`      | Truman Show style         |