---

name: flux-trained description: "Flux Img-to-Img | Face-Guided Image Generation. Generate images guided by a face/ID image with Flux. Triggers: flux img2img, face generation, id image, flux trained, face guided generation" allowed-tools: Bash(curl *), WebFetch

Flux Img-to-Img

Generate images guided by a face/ID image using Flux. Upload an ID image and provide a text prompt to generate portraits and images with identity preservation.

Quick Start

Requires an each::labs API key. Get one at eachlabs.ai.

curl -X POST https://api.eachlabs.ai/v1/prediction \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -d '{
    "model": "flux-trained",
    "version": "0.0.1",
    "input": {
      "prompt": "portrait, color, cinematic",
      "main_face_image": "https://example.com/face-photo.jpg",
      "width": 896,
      "height": 1152,
      "num_steps": 20,
      "guidance_scale": 4
    }
  }'

Parameters

Parameter	Type	Default	Description
guidance_scale	number	4	Guidance scale for text prompt influence (1.0-10.0)
height	integer	1152	Height of generated image (256-1536 pixels)
id_weight	number	1	Weight of the ID image influence (0.0-3.0)
main_face_image	string	-	Upload an ID image for face generation
max_sequence_length	integer	128	Max sequence length for prompt (T5), smaller is faster (128-512)
negative_prompt	string	bad quality, worst quality, text, signature...	Negative prompt
num_outputs	integer	1	Number of images to generate (1-4)
num_steps	integer	20	Number of denoising steps (1-20)
output_format	string	webp	Output format. enum: png, webp
output_quality	integer	80	Quality of output image (1-100)
prompt	string	portrait, color, cinematic	Text prompt to guide generation
seed	integer	-	Random seed (leave blank or -1 for random)
start_step	integer	1	Timestep to start inserting ID (0-4 recommended, 0 for highest fidelity)
true_cfg	number	1	Classifier-Free Guidance scale. 1.0 uses standard CFG
width	integer	896	Width of generated image (256-1536 pixels)

Examples

Cinematic portrait with high fidelity:

curl -X POST https://api.eachlabs.ai/v1/prediction \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -d '{
    "model": "flux-trained",
    "version": "0.0.1",
    "input": {
      "prompt": "cinematic portrait, dramatic lighting, shallow depth of field, professional photography",
      "main_face_image": "https://example.com/headshot.jpg",
      "width": 896,
      "height": 1152,
      "id_weight": 1.5,
      "start_step": 0,
      "num_steps": 20,
      "guidance_scale": 5,
      "output_format": "png"
    }
  }'

Multiple variations:

curl -X POST https://api.eachlabs.ai/v1/prediction \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -d '{
    "model": "flux-trained",
    "version": "0.0.1",
    "input": {
      "prompt": "a person in a futuristic sci-fi setting, holographic displays, neon lighting",
      "main_face_image": "https://example.com/face.jpg",
      "num_outputs": 3,
      "width": 1024,
      "height": 1024,
      "id_weight": 1,
      "guidance_scale": 4,
      "seed": 42
    }
  }'

Related Models

• photomaker - Photo generation with identity preservation
• instant-id - Instant ID avatar generation
• flux-dev - Standard Flux text-to-image

Documentation

• each::labs Docs
• API Reference