Calabi Labs · Guide · 2026-05-29
How to use ai image generator
How to Use an AI Image Generator: A Step-by-Step Guide
AI image generators transform text descriptions into visuals in seconds. Whether you want concept art, marketing photos, or creative illustrations, here's how to use one effectively.
What Is an AI Image Generator?
An AI image generator is a tool that creates images from text prompts (and sometimes reference images). Powered by models trained on vast image datasets, it interprets your description and produces a corresponding visual — often in under 30 seconds.
Step 1: Choose the Right Tool
Pick a platform that fits your needs. Common options include:
- Calabi — fast, clean generations with a free tier (3 cleans, no card)
- Midjourney — Discord-based, strong artistic output
- DALL·E 3 — integrated with ChatGPT, strong prompt adherence
- Stable Diffusion — open-source, runs locally for privacy
- Adobe Firefly — Creative Cloud integration, commercial-safety trained
Start simple. Pick one tool and master it before branching out.
Step 2: Write a Strong Prompt
Your prompt is the most important input. A good prompt has three parts:
1. Subject
Who or what is in the image? > a golden retriever wearing sunglasses
2. Style
How should it look? > photorealistic, editorial photography
3. Context/Setting
Where is it? What's the mood? > sitting on a surfboard at sunset, warm golden light
Full prompt: "A golden retriever wearing sunglasses, photorealistic, editorial photography, sitting on a surfboard at sunset, warm golden light."
Prompt Tips:
- Be specific — "a glass of water" gets generic results; "a frosted glass of water with condensation droplets and a lime slice on a marble counter" gets better output.
- Use adjectives for mood: cinematic, moody, vibrant, minimal, ethereal.
- Reference artists or mediums: "in the style of Studio Ghibli," "watercolor illustration," "3D render."
- Add quality boosters: "4K," "highly detailed," "professional," "award-winning."
Step 3: Adjust Settings (If Available)
Most tools offer controls beyond the basic prompt:
| Setting | What It Does |
|---|---|
| Aspect ratio | Controls width × height (e.g., 1:1 for social, 16:9 for banners) |
| Style preset | Applies a look automatically (illustration, photo, anime) |
| Negative prompt | Lists what you don't want in the image |
| Guidance scale / CFG | How closely the output follows your prompt (higher = stricter) |
| Seed | Locks randomness for reproducible results |
| Steps | More steps = potentially more detail (slower) |
Step 4: Generate and Review
- Enter your prompt.
- Select your settings.
- Click Generate (or equivalent).
- Review the output.
- If it's not right, iterate — tweak the prompt, adjust settings, or try again.
Expect 3–10 generations before you get a keeper. This is normal and expected.
Step 5: Refine and Download
Once you have a strong base image:
- Use outpainting to extend the scene beyond its original edges.
- Use inpainting to replace or fix specific areas.
- Upscale the resolution if needed for print or large formats.
- Download in your preferred format (PNG, JPG, WebP).
Common Use Cases
| Use Case | Tip |
|---|---|
| Blog & content images | Use 16:9 or 3:2 ratio, clean compositions |
| Social media | Match platform dimensions; add text overlays afterward |
| Concept art | Start broad, then add detail with iterative prompts |
| Product mockups | Combine with design tools (Figma, Photoshop) |
| Marketing & ads | Prioritize photorealistic style and high resolution |
Troubleshooting Common Problems
Image doesn't match my prompt:
- Make the prompt more specific.
- Lower the guidance scale if the output looks too "AI-generated" (over-saturated, strange hands).
- Use a negative prompt: "blurry, low quality, distorted."
Output looks generic:
- Add artistic references and style cues.
- Use more unusual descriptive combinations.
Wrong composition:
- Specify placement: "a tree on the left side," not just "a tree."
Hands or faces look wrong:
- This is a known limitation of most models. Try specifying "realistic hands," or use inpainting to fix problem areas.
Quick Prompt Cheat Sheet
Use this formula for faster, better results:
> [Subject] + [setting/environment] + [style/medium] + [lighting/mood] + [quality boosters]
Example: > "A woman reading in a cozy café, rain on the window, film noir style, soft ambient lighting, 35mm film, cinematic grain, 4K — vray render."
Is It Free to Use AI Image Generators?
Most tools offer free tiers with limited generations:
- Calabi — 3 free cleans, no credit card required
- DALL·E — credits-based free access via OpenAI
- Bing Image Creator — free with Microsoft account
- Stable Diffusion — free to run locally (requires GPU)
- Midjourney — limited free generations (varies)
Paid plans typically range from $10–$30/month for more credits and higher resolution outputs.
Legal and Ethical Considerations
- Copyright: AI-generated images may have ambiguous copyright status. Avoid replicating living artists' distinctive styles without permission.
- Commercial use: Check the platform's terms — some restrict commercial use of free-tier outputs.
- Generated content: Many platforms now embed metadata or watermarks identifying AI-generated content.
- Platform rules: Each tool has content policies. Familiarize yourself to avoid account suspension.
Summary: How to Use an AI Image Generator in 5 Steps
- Choose a tool that fits your skill level and budget.
- Write a detailed prompt with subject, style, and context.
- Adjust settings like aspect ratio, style, and negative prompts.
- Generate and iterate — expect a few attempts before you're satisfied.
- Refine and download, then use your image in your project.
Ready to start? Pick a tool, write your first prompt, and generate your first image today.
Try Calabi free at calabilabs.com — 3 cleans, no card.