Image Generation

Image Generation

Generate images using the generate_image tool.

Parameters

| Parameter | Type | Required | Description | |-----------|------|----------|-------------| | prompt | string | yes | Detailed description of the image | | filename | string | yes | Output filename (e.g. poster.png) | | aspect_ratio | string | no | 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 4:5, 5:4, 21:9 | | size | string | no | 1K (default), 2K, 4K | | reference_images | array | no | Storage paths to reference images | | style | string | no | Style hint (e.g. photorealistic, illustration) | | negative_prompt | string | no | What to avoid (e.g. blurry, watermark) | | google_search | boolean | no | Enable real-time data grounding |

Prompt Structure

Build prompts with these 5 components:

1. Style/medium — photograph, illustration, watercolor, digital art, vector, 3D render
2. Subject — who or what, with specific details (pose, clothing, expression, material)
3. Setting — location, time of day, atmosphere, weather
4. Action — what is happening in the scene
5. Composition — camera angle, framing (close-up, wide shot, bird's eye, low angle)

Example: "Cinematic photograph of a futuristic city skyline at golden hour, with flying vehicles crossing between skyscrapers, shot from a rooftop balcony with shallow depth of field, warm amber tones"

Aspect Ratio Guide

Choose based on the intended use:

• 1:1 — social media posts (Instagram feed, profile pictures)
• 16:9 — banners, landscape, YouTube thumbnails, presentations
• 9:16 — stories, reels, vertical mobile content
• 4:3 — classic photo, presentations
• 3:2 — standard photography
• 4:5 — Instagram portrait posts
• 21:9 — ultrawide cinematic banners

Reference Images

Reference images provide visual context. The model sees them BEFORE the text prompt.

For logos and brand assets:

• Add the logo path to reference_images
• In the prompt, be explicit: "Place the provided logo at the bottom center of the image. Do not modify the logo's shape, colors, or proportions — use it exactly as provided, only resize it to fit the composition"
• Never describe what the logo looks like — just describe where and how to use it

For style references:

• Add the style image to reference_images
• In the prompt: "Generate in the same visual style as the provided reference image"

For editing existing images:

• Add the image to reference_images
• Describe the desired changes: "Change the background to a sunset beach scene while keeping the subject unchanged"

Text in Images

• Enclose exact text in quotes: Write the text "SALE 50% OFF"
• Describe typography explicitly: "bold white sans-serif font with a subtle drop shadow"
• Specify placement: "centered at the top of the image"
• Keep text minimal for social media — one headline maximum to avoid clutter

Google Search Grounding

Set google_search: true when the image needs real-time or factual data:

• Stock prices and financial charts
• Weather forecasts
• Current events and news topics
• Sports scores and standings
• Real product data

Example: "Visualize the Bitcoin price trend over the last 7 days as an infographic"

Quality Tips

• Be descriptive, not repetitive. Don't use "4K, masterpiece, trending on artstation" — the model understands natural language. Describe the scene vividly instead.
• Use photographic language for realistic images: camera model, focal length (85mm f/1.4), lighting setup (soft key light with rim light), film stock (Kodak Portra 400)
• Be specific about colors and materials: "matte black aluminum with brushed gold accents" instead of just "dark with gold"
• Resolution matters: Use size: "2K" for social media, size: "4K" for print-quality assets
• Composition keywords: rule of thirds, symmetrical, leading lines, negative space, flat lay, isometric

What NOT to Do

• Don't describe reference images — just describe how to USE them
• Don't add quality spam keywords — focus on scene description
• Don't leave aspect ratio unset for social media — always pick the right ratio
• Don't put too much text in the prompt for text-in-image — keep it to one headline
• Don't forget to use google_search when the image needs current real-world data

After Generation

Always share the saved file URL with the user so they can preview the result.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: openbotx
• Source: openbotx/openbotx
• License: MIT
• Homepage: https://openbotx.ai

Install and usage instructions live in the source repository linked above.