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| 1 | +![ComfyUI Native Flux 1.1 [pro] Ultra Image node](assets/flux-1-1-pro-ultra-image.jpg) |
| 2 | + |
| 3 | +The Flux 1.1 [pro] Ultra Image node allows you to generate ultra-high-resolution images through text prompts, directly connecting to Black Forest Labs' latest image generation API. |
| 4 | + |
| 5 | +This node supports two main usage modes: |
| 6 | +1. **Text-to-Image**: Generate high-quality images from text prompts (when no image input is used) |
| 7 | +2. **Image-to-Image**: Combine existing images with prompts to create new images that blend features from both (Remix mode) |
| 8 | + |
| 9 | +This node supports Ultra mode through API calls, capable of generating images at 4 times the resolution of standard Flux 1.1 [pro] (up to 4MP), without sacrificing prompt adherence, and maintaining super-fast generation times of just 10 seconds. Compared to other high-resolution models, it's more than 2.5 times faster. |
| 10 | + |
| 11 | +## Parameter Description |
| 12 | + |
| 13 | +### Basic Parameters |
| 14 | + |
| 15 | +| Parameter | Type | Default | Description | |
| 16 | +| ----------------- | ------- | ------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | |
| 17 | +| prompt | String | "" | Text description for generating the image | |
| 18 | +| prompt_upsampling | Boolean | False | Whether to use prompt upsampling technique to enhance details. When enabled, automatically modifies prompts for more creative generation, but results become non-deterministic (same seed won't produce exactly the same result) | |
| 19 | +| seed | Integer | 0 | Random seed value, controls generation randomness | |
| 20 | +| aspect_ratio | String | "16:9" | Width-to-height ratio of the image, must be between 1:4 and 4:1 | |
| 21 | +| raw | Boolean | False | When set to True, generates less processed, more natural-looking images | |
| 22 | + |
| 23 | +### Optional Parameters |
| 24 | + |
| 25 | +| Parameter | Type | Default | Description | |
| 26 | +| --------------------- | ----- | ------- | --------------------------------------------------------------------------------------------------------------------------------------------------------- | |
| 27 | +| image_prompt | Image | None | Optional input, used for Image-to-Image (Remix) mode | |
| 28 | +| image_prompt_strength | Float | 0.1 | Active when `image_prompt` is input, adjusts the blend between prompt and image prompt. Higher values make output closer to input image, range is 0.0-1.0 | |
| 29 | + |
| 30 | +### Output |
| 31 | + |
| 32 | +| Output | Type | Description | |
| 33 | +| ------ | ----- | -------------------------------------- | |
| 34 | +| IMAGE | Image | Generated high-resolution image result | |
| 35 | + |
| 36 | +## How It Works |
| 37 | + |
| 38 | +Flux 1.1 [pro] Ultra mode uses optimized deep learning architecture and efficient GPU acceleration technology to achieve high-resolution image generation without sacrificing speed. When a request is sent to the API, the system parses the prompt, applies appropriate parameters, then computes the image in parallel, finally generating and returning the high-resolution result. |
| 39 | + |
| 40 | +Compared to regular models, Ultra mode particularly focuses on detail preservation and consistency at large scales, ensuring impressive quality even at 4MP high resolution. |
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