AI Image Generators: A Complete Practical Guide
AI image generators translate text and reference inputs into new visuals. They are useful for concepts, illustrations, marketing drafts and design exploration, but results vary in instruction following, text rendering, consistency, editing controls and licensing.
Choose a generator for the output you need
Some products prioritise photorealism, while others are stronger for illustration, typography, product mock-ups or image editing. Decide whether you need a single striking image, a consistent series, precise dimensions, transparent backgrounds or editable layers.
Check maximum resolution, export format, watermark policy, generation speed and whether reference images are supported. If brand consistency matters, test repeated characters, colours and layouts before committing to a campaign.
Write a controllable visual prompt
Describe the subject, environment, composition, lighting, medium and constraints. Put the most important requirement early. Specify camera position or framing when relevant, such as overhead product shot, eye-level portrait or wide establishing view.
Avoid stuffing contradictory style words into one prompt. Begin with a clear visual direction, generate variations and change one variable at a time. If the product supports negative instructions, use them for visible failures such as extra text or clutter—not as a substitute for a clear main prompt.
- Subject and action
- Setting and time
- Composition and viewpoint
- Lighting and colour palette
- Medium or visual treatment
- Aspect ratio and exclusions
Use references responsibly
Only upload images you have permission to use. Reference images can guide composition, colour or identity, but product rules differ. Avoid generating deceptive images of real people or imitating a living artist’s identifiable style.
For product work, compare the output against the real product. AI may alter labels, controls, proportions or safety details. Treat generated product images as concepts unless every visible detail has been checked.
Fix common image failures
Use inpainting or local editing when one area is wrong instead of regenerating the entire composition. Increase text separately in a design tool when accurate spelling and typography matter. For hands, interfaces and technical objects, inspect at full resolution.
Keep seeds, prompts or project history where the tool supports them. This makes it easier to reproduce a direction. Generate at the intended aspect ratio early because aggressive cropping can destroy the composition.
Review rights and disclosure
Read the current terms for commercial use, ownership and restrictions. Free and paid plans may differ. Consider whether clients, marketplaces or advertising platforms require disclosure. Do not imply that a generated scene documents a real event.
Keep records of prompts, source images and licences for commercial projects. Trademark, privacy and publicity issues can still apply even when the tool grants rights to its output.
Compare image tools fairly
Use a benchmark covering people, products, readable text, a complex composition and an edit. Score instruction following, visual defects, consistency, editing effort, speed and cost per usable result. The number of generations matters less than the number you can actually publish.