---
title: Riverflow 2 Preview Max | Runware Docs
url: https://runware.ai/docs/models/sourceful-riverflow-2-preview-max
description: High detail Riverflow 2 model for premium product renders
---
# Riverflow 2 Preview Max

Riverflow 2 Preview Max targets commercial image work that needs strict control over detail and lighting. It produces clean product renders with accurate reflections and sharp textures. Use it when you need consistent visual quality for campaigns or client deliveries.

- **ID**: `sourceful:2@3`
- **Status**: live
- **Creator**: Sourceful
- **Release Date**: November 19, 2025
- **Capabilities**: Text to Image, Image to Image, Image Editing, Upscale

## Pricing

Each image generation costs $0.06358 at 1024x1024.

- **1024x1024**: `$0.06358`

## Compatibility & Validation

`width` and `height` must be used together.

---

The following dimension combinations are supported:

| Configuration | Dimensions |
| --- | --- |
| `1K (1:1)` | `1024x1024` |
| `2K (1:1)` | `2048x2048` |
| `4K (1:1)` | `4096x4096` |
| `1K (4:3)` | `1152x864` |
| `2K (4:3)` | `2304x1728` |
| `4K (4:3)` | `4608x3456` |
| `1K (3:4)` | `864x1152` |
| `2K (3:4)` | `1728x2304` |
| `4K (3:4)` | `3456x4608` |
| `1K (16:9)` | `1280x720` |
| `2K (16:9)` | `2560x1440` |
| `4K (16:9)` | `5120x2880` |
| `1K (9:16)` | `720x1280` |
| `2K (9:16)` | `1440x2560` |
| `4K (9:16)` | `2880x5120` |
| `1K (3:2)` | `1248x832` |
| `2K (3:2)` | `2496x1664` |
| `4K (3:2)` | `4992x3328` |
| `1K (2:3)` | `832x1248` |
| `2K (2:3)` | `1664x2496` |
| `4K (2:3)` | `3328x4992` |
| `1K (7:3)` | `1512x648` |
| `2K (7:3)` | `3024x1296` |
| `4K (7:3)` | `6048x2592` |

## Request Parameters

**API Options**

Platform-level options for task execution and delivery.

### [taskType](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#request-tasktype)

- **Type**: `string`
- **Required**: true
- **Value**: `imageInference`

Identifier for the type of task being performed

### [taskUUID](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#request-taskuuid)

- **Type**: `string`
- **Required**: true
- **Format**: `UUID v4`

UUID v4 identifier for tracking tasks and matching async responses. Must be unique per task.

### [outputType](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#request-outputtype)

- **Type**: `string`
- **Default**: `URL`

Image output type.

**Allowed values**: `URL` `base64Data` `dataURI`

### [outputFormat](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#request-outputformat)

- **Type**: `string`
- **Default**: `JPG`

Specifies the file format of the generated output. The available values depend on the task type and the specific model's capabilities.

- \`JPG\`: Best for photorealistic images with smaller file sizes (no transparency).
- \`PNG\`: Lossless compression, supports high quality and transparency (alpha channel).
- \`WEBP\`: Modern format providing superior compression and transparency support.

> [!NOTE]
> \*\*Transparency\*\*: If you are using features like background removal or LayerDiffuse that require transparency, you must select a format that supports an alpha channel (e.g., \`PNG\`, \`WEBP\`, \`TIFF\`). \`JPG\` does not support transparency.

**Allowed values**: `JPG` `PNG` `WEBP`

### [outputQuality](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#request-outputquality)

- **Type**: `integer`
- **Min**: `20`
- **Max**: `99`
- **Default**: `95`

Compression quality of the output. Higher values preserve quality but increase file size.

### [webhookURL](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#request-webhookurl)

- **Type**: `string`
- **Format**: `URI`

Specifies a webhook URL where JSON responses will be sent via HTTP POST when generation tasks complete. For batch requests with multiple results, each completed item triggers a separate webhook call as it becomes available.

**Learn more** (1 resource):

- [Webhooks](https://runware.ai/docs/platform/webhooks) (platform)

### [deliveryMethod](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#request-deliverymethod)

- **Type**: `string`
- **Default**: `sync`

Determines how the API delivers task results.

**Allowed values**:

- `sync` Returns complete results directly in the API response.
- `async` Returns an immediate acknowledgment with the task UUID. Poll for results using getResponse.

**Learn more** (1 resource):

- [Task Polling](https://runware.ai/docs/platform/task-polling) (platform)

### [uploadEndpoint](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#request-uploadendpoint)

- **Type**: `string`
- **Format**: `URI`

Specifies a URL where the generated content will be automatically uploaded using the HTTP PUT method. The raw binary data of the media file is sent directly as the request body. For secure uploads to cloud storage, use presigned URLs that include temporary authentication credentials.

**Common use cases:**

- **Cloud storage**: Upload directly to S3 buckets, Google Cloud Storage, or Azure Blob Storage using presigned URLs.
- **CDN integration**: Upload to content delivery networks for immediate distribution.

```text
// S3 presigned URL for secure upload
https://your-bucket.s3.amazonaws.com/generated/content.mp4?X-Amz-Signature=abc123&X-Amz-Expires=3600

// Google Cloud Storage presigned URL
https://storage.googleapis.com/your-bucket/content.jpg?X-Goog-Signature=xyz789

// Custom storage endpoint
https://storage.example.com/uploads/generated-image.jpg
```

The content data will be sent as the request body to the specified URL when generation is complete.

### [safety](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#request-safety)

- **Path**: `safety.checkContent`
- **Type**: `object (2 properties)`

Content safety checking configuration for image generation.

#### [checkContent](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#request-safety-checkcontent)

- **Path**: `safety.checkContent`
- **Type**: `boolean`
- **Default**: `false`

Enable or disable content safety checking. When enabled, defaults to `fast` mode.

#### [mode](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#request-safety-mode)

- **Path**: `safety.mode`
- **Type**: `string`
- **Default**: `none`

Safety checking mode for image generation.

**Allowed values**:

- `none` Disables checking.
- `fast` Performs a single check.

### [ttl](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#request-ttl)

- **Type**: `integer`
- **Min**: `60`

Time-to-live (TTL) in seconds for generated content. Only applies when `outputType` is `URL`.

### [includeCost](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#request-includecost)

- **Type**: `boolean`
- **Default**: `false`

Include task cost in the response.

### [numberResults](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#request-numberresults)

- **Type**: `integer`
- **Min**: `1`
- **Max**: `20`
- **Default**: `1`

Number of results to generate. Each result uses a different seed, producing variations of the same parameters.

**Inputs**

Input resources for the task (images, audio, etc). These must be nested inside the \`inputs\` object.

### [referenceImages](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#request-inputs-referenceimages)

- **Path**: `inputs.referenceImages`
- **Type**: `array of strings`

List of reference images (UUID, URL, Data URI, or Base64).

**Generation Parameters**

Core parameters for controlling the generated content.

### [model](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#request-model)

- **Type**: `string`
- **Required**: true
- **Value**: `sourceful:2@3`

Identifier of the model to use for generation.

**Learn more** (3 resources):

- [Text To Image: Model Selection The Foundation Of Generation](https://runware.ai/docs/guides/text-to-image#model-selection-the-foundation-of-generation) (guide)
- [Image Inpainting: Model Specialized Inpainting Models](https://runware.ai/docs/guides/image-inpainting#model-specialized-inpainting-models) (guide)
- [Image Outpainting: Other Critical Parameters](https://runware.ai/docs/guides/image-outpainting#other-critical-parameters) (guide)

### [positivePrompt](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#request-positiveprompt)

- **Type**: `string`
- **Required**: true

Text prompt describing elements to include in the generated output.

**Learn more** (2 resources):

- [Text To Image: Prompts Guiding The Generation](https://runware.ai/docs/guides/text-to-image#prompts-guiding-the-generation) (guide)
- [Image Outpainting: Other Critical Parameters](https://runware.ai/docs/guides/image-outpainting#other-critical-parameters) (guide)

### [width](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#request-width)

- **Type**: `integer`
- **Required**: true
- **Paired with**: height

Width of the generated media in pixels.

**Learn more** (2 resources):

- [Image To Image: Dimensions Changing Aspect Ratio](https://runware.ai/docs/guides/image-to-image#dimensions-changing-aspect-ratio) (guide)
- [Image Outpainting: Dimensions Critical For Outpainting](https://runware.ai/docs/guides/image-outpainting#dimensions-critical-for-outpainting) (guide)

### [height](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#request-height)

- **Type**: `integer`
- **Required**: true
- **Paired with**: width

Height of the generated media in pixels.

**Learn more** (2 resources):

- [Image To Image: Dimensions Changing Aspect Ratio](https://runware.ai/docs/guides/image-to-image#dimensions-changing-aspect-ratio) (guide)
- [Image Outpainting: Dimensions Critical For Outpainting](https://runware.ai/docs/guides/image-outpainting#dimensions-critical-for-outpainting) (guide)

## Response Parameters

### [taskType](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#response-tasktype)

- **Type**: `string`
- **Required**: true
- **Value**: `imageInference`

Type of the task.

### [taskUUID](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#response-taskuuid)

- **Type**: `string`
- **Required**: true
- **Format**: `UUID v4`

UUID of the task.

### [imageUUID](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#response-imageuuid)

- **Type**: `string`
- **Required**: true
- **Format**: `UUID v4`

UUID of the output image.

### [imageURL](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#response-imageurl)

- **Type**: `string`
- **Format**: `URI`

URL of the output image.

### [imageBase64Data](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#response-imagebase64data)

- **Type**: `string`

Base64-encoded image data.

### [imageDataURI](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#response-imagedatauri)

- **Type**: `string`
- **Format**: `URI`

Data URI of the output image.

### [seed](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#response-seed)

- **Type**: `integer`

The seed used for generation. If none was provided, shows the randomly generated seed.

### [NSFWContent](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#response-nsfwcontent)

- **Type**: `boolean`

Flag indicating if NSFW content was detected.

### [cost](https://runware.ai/docs/models/sourceful-riverflow-2-preview-max#response-cost)

- **Type**: `float`

Task cost in USD. Present when `includeCost` is set to `true` in the request.

## Examples

### Glacial Couture Handbag Tableau (Text to Image)

![Glacial Couture Handbag Tableau](https://assets.runware.ai/examples/sourceful-riverflow-2-preview-max/38a974e0-7bf8-48fa-b4a0-05ce6aa28dc7.jpg)

**Request**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "c9b39340-c585-4ec3-8437-ca29de2e659f",
  "model": "sourceful:2@3",
  "positivePrompt": "A luxury structured handbag displayed on a carved block of pale blue ice in a pristine studio set, ivory pebbled leather with brushed platinum clasp and hardware, immaculate edge paint, visible fine stitching, soft cashmere scarf partially draped beside it, scattered clear quartz shards and a few silver leaves for styling, cool high-fashion advertising aesthetic, ultra-clean composition, three-quarter product angle, sharp textures, accurate specular highlights, refined reflections, subtle shadow falloff, premium catalog quality, controlled diffused key light with narrow rim light, elegant winter palette of ivory, frost blue, and silver, photoreal, extremely detailed, commercial luxury campaign image",
  "width": 1248,
  "height": 832
}
```

**Response**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "c9b39340-c585-4ec3-8437-ca29de2e659f",
  "imageUUID": "ab017a1e-6c36-42fc-8419-dcc1f8c304e9",
  "imageURL": "https://im.runware.ai/image/os/a17d13/ws/2/ii/ab017a1e-6c36-42fc-8419-dcc1f8c304e9.jpg",
  "seed": 1011103804,
  "cost": 0.075
}
```

---

### Luxury Wristwatch Marble Pedestal (Text to Image)

![Luxury Wristwatch Marble Pedestal](https://assets.runware.ai/examples/sourceful-riverflow-2-preview-max/37bb4d24-79f9-4893-bbd7-6fefa234022d.jpg)

**Request**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "4e3b009f-1b29-4eb7-8c2f-79754a3739fb",
  "model": "sourceful:2@3",
  "positivePrompt": "A premium commercial product shot of an elegant wristwatch displayed on a carved dark marble pedestal, brushed titanium case, deep forest-green dial, faceted sapphire crystal, finely knurled crown, stitched leather strap with subtle texture, immaculate reflection control, sharp engraved markings, realistic metal anisotropy, soft directional key light from upper left, gentle fill light, faint rim highlights, seamless warm gray backdrop, minimal luxury branding aesthetic, ultra-clean composition, high-end catalog photography, exceptional texture fidelity, accurate shadows, pristine studio finish",
  "width": 1248,
  "height": 832
}
```

**Response**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "4e3b009f-1b29-4eb7-8c2f-79754a3739fb",
  "imageUUID": "674bcd01-4783-43da-b21c-6831aacfc572",
  "imageURL": "https://im.runware.ai/image/os/a20d05/ws/2/ii/674bcd01-4783-43da-b21c-6831aacfc572.jpg",
  "seed": 989285982,
  "cost": 0.075
}
```

---

### Cut Crystal Perfume Still-Life (Text to Image)

![Cut Crystal Perfume Still-Life](https://assets.runware.ai/examples/sourceful-riverflow-2-preview-max/633a1782-9b03-4c3f-ade7-e3b67b045100.jpg)

**Request**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "f19f2ce2-ff3b-4a62-974c-8dd6d619e151",
  "model": "sourceful:2@3",
  "positivePrompt": "Ultra-premium commercial product photograph of an ornate cut-crystal perfume bottle with a faceted stopper, placed on a polished black lacquer surface with a curved champagne-gold metal accent and a soft ivory backdrop. Razor-sharp glass refractions, realistic caustics, subtle reflections, immaculate highlights, engraved label plate, tiny condensation-free surface details, luxury cosmetics campaign aesthetic, balanced three-point studio lighting, high micro-contrast, clean composition, elegant negative space, rich but restrained color palette, extremely accurate materials, flawless retouching, high-end advertising render realism.",
  "width": 1248,
  "height": 832
}
```

**Response**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "f19f2ce2-ff3b-4a62-974c-8dd6d619e151",
  "imageUUID": "bf880993-e932-49c3-a700-8c0dab30d19e",
  "imageURL": "https://im.runware.ai/image/os/a16d07/ws/2/ii/bf880993-e932-49c3-a700-8c0dab30d19e.jpg",
  "seed": 424442777,
  "cost": 0.075
}
```

---

### Crystal Perfume Bottle Still-Life (Text to Image)

![Crystal Perfume Bottle Still-Life](https://assets.runware.ai/examples/sourceful-riverflow-2-preview-max/eb36dd7d-46da-4569-a51f-c9ec4aab2e95.jpg)

**Request**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "f7d86f8d-369a-46d5-8715-a6227f703f92",
  "model": "sourceful:2@3",
  "positivePrompt": "A luxury crystal perfume bottle centered on a sculpted black basalt plinth, faceted clear glass with pale amber liquid, brushed champagne-gold cap, engraved label plate, immaculate studio product photography, razor-sharp textures, accurate caustics and reflections, soft directional key light from upper left, subtle rim light, gentle shadow falloff on seamless warm gray background, premium cosmetics campaign aesthetic, ultra-clean composition, realistic materials, high micro-contrast, elegant negative space, flawless commercial retouching, no people, no extra objects",
  "width": 1248,
  "height": 832
}
```

**Response**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "f7d86f8d-369a-46d5-8715-a6227f703f92",
  "imageUUID": "8c2c4976-7a97-4672-9bef-44ef6e53631d",
  "imageURL": "https://im.runware.ai/image/os/a03d21/ws/2/ii/8c2c4976-7a97-4672-9bef-44ef6e53631d.jpg",
  "seed": 538581931,
  "cost": 0.075
}
```