What is the best prompt format for MiniMax H3?

MiniMax's official format: an integratedmultimodaldescription field with numbered, timed shots, then overallsoundscape and nondiegetic_music. It is required for good results on the open weights, which ship without MiniMax's prompt preprocessor. On hosted services that rewrite prompts, a clear one-shot brief in plain English also works.

Does MiniMax H3 support negative prompts?

There is no separate negative-prompt field. ComfyUI recommends describing what should appear instead, since an exclusion adds the unwanted word to the prompt on the local templates; fal reports that specific exclusions inside the prompt work on its hosted endpoints. Try the positive phrasing first.

How do I write dialogue in a MiniMax H3 prompt?

In plain prompts, put the line in quotes and say who speaks it. In the official format, give each speaker an ID such as (S1), describe their voice, and put only the language tag and the words inside tags: (S1) says: [English] Welcome back. . Keep each line short enough to say in the time available.

Can I write MiniMax H3 prompts in other languages?

MiniMax's guide asks for the prompt itself in English, with dialogue, lyrics and on-screen text kept in their original language. So a Spanish line is written as [Spanish] ... inside an English description.

How long should a MiniMax H3 prompt be?

As long as the clip needs and no longer than it can play. fal's guide gives H3 room for 7,000 characters; Genie4AI's prompt box takes up to 5,000. MiniMax suggests 350–500 English words for the description in full-reference mode. What matters more is that the timeline you describe fits the 5–15 seconds you request.

What is a MiniMax H3 prompt enhancer?

A step that rewrites a short prompt into a fuller one before rendering. MiniMax's hosted version is H3-Context-IR, which is not in the open-weights release; fal offers promptexpansionmode on its H3 Max endpoints. Genie4AI runs fal's balanced setting on every H3 request. Running the weights locally, you can use MiniMax's prompt-writing skill with your own language model.

How do I stop characters drifting in MiniMax H3?

Anchor the character with a first-frame image or reference images, and name the features that must not change — face, hair, clothing. Make sure your references agree with each other.

MiniMax H3 Prompting Guide: Format, Dialogue, Camera and Examples