# MiniMax H3 Max Relight

> Relight an existing video with MiniMax H3 Max — a sphere-render reference image sets the target lighting and the output keeps the source clip's length. Sources up to 15s, output up to 2K.

## Overview

- **Model ID**: `minimax-h3-max-relight`
- **Workflow**: `minimax/h3-max/relight`
- **Provider**: MiniMax
- **Category**: Video → Video (video)
- **Output**: A video URL.
- **Tags**: relight, video input, image input, 2k
- **Unified endpoint**: `POST https://api.picsart.com/workflows/v1/models/execute` (model id in the body)
- **Compatibility endpoint**: `POST https://api.picsart.com/workflows/minimax/h3-max/relight/execute` (vendor's own parameters)
- **Execution**: long-running — use the async submit/poll pair or the SDK, which polls for you
- **Model page**: https://picsart.com/api-platform/models/minimax-h3-max-relight

## Pricing

Rates are in USD. Every row below is an exact rate for the settings it names — the columns are the settings that change the price for this model. Every response reports what was actually charged in `response.usage.credits`.

| Tier | Rate |
| --- | --- |
| 480p | $0.055 / sec |
| 768p | $0.088 / sec |
| 1080p | $0.176 / sec |
| 2K | $0.352 / sec |

Published rates. Volume pricing, invoicing and annual agreements: https://picsart.com/api-platform/contact-sales

## Authentication

The SDK and the REST API authenticate with a Picsart API key sent as a bearer token. Create a key in the console at https://picsart.com/api-platform/dashboard/api-keys, keep it in a server-side environment variable, and never ship it in browser code or commit it.

```bash
export PICSART_API_KEY="YOUR_KEY"
```

```http
Authorization: Bearer $PICSART_API_KEY
```

The CLI and the MCP server do not use an API key: `gen-ai login` signs in through the browser once per machine and stores a token locally.

## Interfaces

- **SDK** — `@picsart/ai-sdk` (TypeScript, Node 20+, ESM). Type-safe `ai.generate()` / `ai.generateText()` with per-model parameter types; polls long jobs for you.
- **REST** — the API gateway at `https://api.picsart.com`. Sync `/execute`, or async `/submit` + `/{taskId}/result`.
- **CLI** — `@picsart/gen-ai` (`gen-ai`). Generate from a terminal, quote cost before spending, emit JSON for pipelines.
- **MCP** — the same models inside Claude Code, Cursor, Windsurf and other MCP hosts. Setup: https://picsart.com/gen-ai-mcp/

```bash
npm install @picsart/ai-sdk      # SDK
npm install -g @picsart/gen-ai   # CLI (also drives the MCP server)
```

## Unified API (recommended)

One parameter set, used by the SDK and by REST alike: the names below are what `ai.generate('minimax-h3-max-relight', …)` takes, and what goes inside the inner `params` of a REST call. Over REST the model id travels in the body, not the path — one workflow, `v1/models`, fronts the whole catalogue.

### Execution modes

- **Sync** — `POST /workflows/v1/models/execute` returns the result in one call. Only for jobs that finish within ~20 seconds; otherwise it times out.
- **Async** — `POST /workflows/v1/models/submit` returns a task id; poll `GET /workflows/v1/models/{taskId}/result` until `response.status` is `COMPLETED` or `FAILED`. Task statuses: `ACCEPTED` · `IN_PROGRESS` · `COMPLETED` · `FAILED`.
- **SDK** — `ai.generate()` always awaits the finished result; polling is hidden.

Video jobs routinely outrun the sync limit: use async over REST, or the SDK, which polls for you.

### Input parameters

- **`videoUrl`** (`string`, _required_): Source Video
  - Accepts: video URL, up to 15s
- **`imageUrls`** (`list<string>`, _required_): Lighting Reference
  - Accepts: image URLs (max 1)
- **`resolution`** (`string`, _optional_)
  - Default: `"768p"`
  - Options: `480p`, `768p`, `1080p`, `2k`
- **`aspectRatio`** (`string`, _optional_)
  - Default: `"16:9"`
  - Options: `adaptive`, `21:9`, `16:9`, `4:3`, `1:1`, `3:4`, `9:16`
- **`seed`** (`number`, _optional_): Seed
  - Range: 0–2147483647 (step 1)
- **`enableSafetyChecker`** (`boolean`, _optional_): Safety Checker
  - Default: `true`

### Input JSON Schema

The inner `params` object. Over REST it is wrapped as `{ "params": { "model": "<id>", "params": <this> } }`; the SDK takes it directly.

```json
{
  "type": "object",
  "required": [
    "videoUrl",
    "imageUrls"
  ],
  "properties": {
    "videoUrl": {
      "type": "string",
      "format": "uri",
      "description": "Source Video"
    },
    "imageUrls": {
      "type": "array",
      "items": {
        "type": "string",
        "format": "uri",
        "description": "image URL"
      },
      "maxItems": 1,
      "description": "Lighting Reference"
    },
    "resolution": {
      "type": "string",
      "enum": [
        "480p",
        "768p",
        "1080p",
        "2k"
      ],
      "default": "768p"
    },
    "aspectRatio": {
      "type": "string",
      "enum": [
        "adaptive",
        "21:9",
        "16:9",
        "4:3",
        "1:1",
        "3:4",
        "9:16"
      ],
      "default": "16:9"
    },
    "seed": {
      "type": "number",
      "minimum": 0,
      "maximum": 2147483647,
      "multipleOf": 1,
      "description": "Seed"
    },
    "enableSafetyChecker": {
      "type": "boolean",
      "default": true,
      "description": "Safety Checker"
    }
  },
  "additionalProperties": false
}
```

### Required parameters example

The required parameters plus the defaults that shape the output, as a REST body:

```json
{
  "params": {
    "model": "minimax-h3-max-relight",
    "params": {
      "videoUrl": "https://cdn.example.com/input.mp4",
      "imageUrls": [
        "https://cdn.example.com/input.jpg"
      ],
      "resolution": "768p",
      "aspectRatio": "16:9"
    }
  }
}
```

### Response

The body is the gateway's status envelope: the output is at `response.result`, next to the task id, its status and the credits charged. Asset models return `url` plus an `items` array of results.

```json
{
  "status": "success",
  "response": {
    "id": "task_abc123",
    "status": "COMPLETED",
    "result": {
      "url": "https://cdn.picsart.com/…/result",
      "items": [
        {
          "url": "https://cdn.picsart.com/…/result"
        }
      ],
      "model": "minimax-h3-max-relight"
    }
  }
}
```

What `ai.generate()` / `ai.generateText()` resolve to (the envelope already unwrapped):

```json
{
  "items": [
    {
      "url": "https://cdn.picsart.com/…/result"
    }
  ],
  "model": "minimax-h3-max-relight"
}
```

### Usage examples

#### TypeScript (SDK)

```typescript
import { createClient } from '@picsart/ai-sdk';

const ai = createClient({
  apiKey: process.env.PICSART_API_KEY,
  apiUrl: 'https://api.picsart.com',
});

const result = await ai.generate('minimax-h3-max-relight', {
  videoUrl: "https://cdn.example.com/input.mp4",
  imageUrls: [
    "https://cdn.example.com/input.jpg"
  ],
  resolution: "768p",
  aspectRatio: "16:9"
});

console.log(result.url); // video URL
```

#### cURL (sync)

```bash
curl -X POST 'https://api.picsart.com/workflows/v1/models/execute' \
  -H 'Authorization: Bearer $PICSART_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
  "params": {
    "model": "minimax-h3-max-relight",
    "params": {
      "videoUrl": "https://cdn.example.com/input.mp4",
      "imageUrls": [
        "https://cdn.example.com/input.jpg"
      ],
      "resolution": "768p",
      "aspectRatio": "16:9"
    }
  }
}'
```

#### cURL (async: submit, then poll)

```bash
# 1. Submit the job
curl -X POST 'https://api.picsart.com/workflows/v1/models/submit' \
  -H 'Authorization: Bearer $PICSART_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
  "params": {
    "model": "minimax-h3-max-relight",
    "params": {
      "videoUrl": "https://cdn.example.com/input.mp4",
      "imageUrls": [
        "https://cdn.example.com/input.jpg"
      ],
      "resolution": "768p",
      "aspectRatio": "16:9"
    }
  }
}'
# → { "status": "success", "response": { "id": "task_abc123" } }

# 2. Poll until response.status is COMPLETED
curl 'https://api.picsart.com/workflows/v1/models/task_abc123/result' \
  -H 'Authorization: Bearer $PICSART_API_KEY'
```

#### CLI

```bash
gen-ai login  # once per machine
gen-ai models info minimax-h3-max-relight  # this model's parameters
gen-ai pricing minimax-h3-max-relight  # quote before spending credits
gen-ai generate -m minimax-h3-max-relight \
  -i ./input.jpg \
  --ar 16:9
```

## Compatibility API (vendor parameters)

Alongside the unified API, the `minimax/h3-max/relight` workflow takes MiniMax's own parameters exactly as the vendor defines them — nothing renamed or reshaped. It is the shortest path onto Picsart for request bodies already written against the vendor; the trade is that a request is written for one vendor, and the result comes back in the vendor's own shape. Same authentication.

- **Endpoint**: `POST https://api.picsart.com/workflows/minimax/h3-max/relight/execute` (sync) · `POST …/submit` + `GET …/{taskId}/result` (async)
- **SDK**: `ai.apis.run('minimax/h3-max/relight', params, { mode })` — params forwarded verbatim

### Vendor parameters

| Parameter | Type | Required | Default | Details |
| --- | --- | --- | --- | --- |
| `resolution` | `string` | no | `768P` | Output video resolution. 480P and 768P generate natively; 1080P and 2K (1440p) use latent upscaling and refinement from 768P. · Options: `480P`, `768P`, `1080P`, `2K` |
| `seed` | `integer` | no | — | Random seed for video generation. |
| `sync_mode` | `boolean` | no | `false` | Return video as a data URI. |
| `enable_safety_checker` | `boolean` | no | `true` | Enable safety checking. |
| `video_url` | `string` | yes | — | Source video up to 15 seconds long. Converted to constant 24 fps and trimmed at the end to the closest 17n+5 frame count, with at least 56 frames (about 2.33 seconds) remaining. The output matches this prepared video's frame count and duration. · min 1 chars |
| `aspect_ratio` | `string` | no | `16:9` | Output video aspect ratio. · Options: `adaptive`, `21:9`, `16:9`, `4:3`, `1:1`, `3:4`, `9:16` |
| `reference_image_url` | `string` | yes | — | Sphere render showing the target lighting. · min 1 chars |
| `options` | `object` | no | — | Platform-specific options for safety checks and Picsart Drive integration. |
| └ `safety_checks` | `object` | no | — | Safety check configuration. |
| └   `enabled` | `boolean` | no | `true` | Enable or disable text safety checks. Defaults to true. |
| └ `drive` | `object` | no | — | Picsart Drive storage options. When provided, the result will be saved to the user's Drive. |
| └   `name` | `string` | yes | — | Filename to save the result as in Picsart Drive. |
| └   `attributes` | `object` | no | — | Additional file metadata attributes. |
| └   `folder` | `object` | no | — | Destination folder in Picsart Drive. |

### Example request body

```json
{
  "params": {
    "video_url": "https://cdn.example.com/input.mp4",
    "reference_image_url": "https://cdn.example.com/input.jpg"
  }
}
```

### Usage examples

#### TypeScript (`ai.apis.run`)

```typescript
import { createClient, ApiRunMode } from '@picsart/ai-sdk';

const ai = createClient({
  apiKey: process.env.PICSART_API_KEY,
  apiUrl: 'https://api.picsart.com',
});

// Calls the 'minimax/h3-max/relight' workflow directly — params are sent as-is.
const { result, usage } = await ai.apis.run('minimax/h3-max/relight', {
  video_url: "https://cdn.example.com/input.mp4",
  reference_image_url: "https://cdn.example.com/input.jpg"
}, {
  mode: ApiRunMode.SYNC,
});

console.log(result); // workflow-specific output
console.log(usage?.credits); // amount charged, in $
```

#### cURL (sync)

```bash
curl -X POST 'https://api.picsart.com/workflows/minimax/h3-max/relight/execute' \
  -H 'Authorization: Bearer $PICSART_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
  "params": {
    "video_url": "https://cdn.example.com/input.mp4",
    "reference_image_url": "https://cdn.example.com/input.jpg"
  }
}'
```

#### cURL (async: submit, then poll)

```bash
# 1. Submit the job
curl -X POST 'https://api.picsart.com/workflows/minimax/h3-max/relight/submit' \
  -H 'Authorization: Bearer $PICSART_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
  "params": {
    "video_url": "https://cdn.example.com/input.mp4",
    "reference_image_url": "https://cdn.example.com/input.jpg"
  }
}'
# → { "status": "success", "response": { "id": "wf_abc123" } }

# 2. Poll until response.status is COMPLETED
curl 'https://api.picsart.com/workflows/minimax/h3-max/relight/wf_abc123/result' \
  -H 'Authorization: Bearer $PICSART_API_KEY'
```

### Response

Over HTTP the vendor-shaped result arrives inside the gateway envelope at `response.result`:

```json
{
  "status": "success",
  "response": {
    "id": "wf_abc123",
    "status": "COMPLETED",
    "result": {
      "timings": {},
      "seed": 0,
      "video": {
        "file_name": "z9RV14K95DvU.png",
        "url": "https://cdn.picsart.com/…/result.jpg",
        "content_type": "image/png",
        "file_size": 4404019
      }
    }
  }
}
```

`ai.apis.run()` unwraps that envelope and resolves to `{ result, usage }`:

```json
{
  "result": {
    "timings": {},
    "seed": 0,
    "video": {
      "file_name": "z9RV14K95DvU.png",
      "url": "https://cdn.picsart.com/…/result.jpg",
      "content_type": "image/png",
      "file_size": 4404019
    }
  }
}
```

## Additional resources

- Model page: https://picsart.com/api-platform/models/minimax-h3-max-relight
- Try it: https://picsart.com/api-platform/models/minimax-h3-max-relight/playground
- SDK: https://picsart.com/api-platform/models/minimax-h3-max-relight/sdk
- REST API (unified): https://picsart.com/api-platform/models/minimax-h3-max-relight/api
- Compatibility API (vendor parameters): https://picsart.com/api-platform/models/minimax-h3-max-relight/advanced
- Pricing: https://picsart.com/api-platform/models/minimax-h3-max-relight/pricing
- This document: https://picsart.com/api-platform/models/minimax-h3-max-relight/llms.txt
- All models: https://picsart.com/api-platform/models
- Docs — quickstart https://picsart.com/api-platform/docs/quickstart, authentication https://picsart.com/api-platform/docs/authentication, SDK https://picsart.com/api-platform/docs/sdk, REST https://picsart.com/api-platform/docs/api-reference, CLI https://picsart.com/api-platform/docs/cli, MCP https://picsart.com/api-platform/docs/mcp
- CLI reference: https://picsart.github.io/picsart-mcp-cli-docs/guide/introduction