# AI background generator: what to look for in the results [Canonical HTML page](https://gradiently.design/guide/ai-background-generator) A generated background can look perfect in a preview and fall apart on a banner. Here are the checks that separate a usable background from a pretty thumbnail. ## The short version - When you use an AI background generator, judge the output at full size, not in the preview, because banding, blur and artefacts hide at thumbnail scale. - The six things to check are resolution, banding, artefacts, uniqueness, usage rights and editability. - A generated background is usually a flat image, so changing its shape or colours often means generating again, whereas a background stored as a recipe can be redrawn for any size. - Usage rights for AI-generated images depend on each tool's terms and on local law, so read the terms before using a background commercially. - Always test a background with real words on it, because a busy area behind a headline makes it hard to read. An **AI background generator** can make an attractive image in seconds, but whether it is usable depends on checks the preview can't show you. Look at it at full size for blur and banding, zoom into the corners for artefacts, put your real headline on it, try it in a second format, and read the tool's terms before using it commercially. A background that passes all of that is worth keeping; one that only looks good as a thumbnail will let you down on a banner or a print. This guide walks through each check, then compares generated images with backgrounds built as recipes. For designing backgrounds by hand, see [how to make a gradient background that doesn't look generic](https://gradiently.design/guide/gradient-background). ## Six things to check in any generated background | Check | What to look for | Why it matters | | --- | --- | --- | | Resolution | Is it sharp at 100% zoom at the size you need? | Upscaled images look soft on large screens and in print | | Banding | Visible stripes in smooth, dark or subtle areas | Compression on upload makes bands worse | | Artefacts | Smudges, repeating patches, warped edges, ghost text | They read as cheap once someone notices | | Uniqueness | Would it blend into your category's feeds? | A background everyone has can't identify you | | Rights | What the tool's terms say about commercial use | Rules differ by tool and country | | Editability | Can you change colours, shape or motion without regenerating? | You will need other sizes and variations | The checklist. Most generated backgrounds pass two or three of these; the good ones pass all six. ## Resolution and banding Many generators produce images around the size of a social post and offer upscaling for anything larger. Upscaling invents detail, which is usually fine for texture and poor for smooth colour. If you need a 1920 × 1080 slide or a 2480 × 3508 A4 poster, check the file at that size at 100% zoom, not fitted to your screen. - Instagram post: 1080 × 1350 - Slide 16:9: 1920 × 1080 - YouTube channel art: 2560 × 1440 - A4 poster at 300 dpi: 2480 × 3508 Sizes a single background may need to cover, drawn to scale. Check the file at each real size, not fitted to your screen. Banding is the stepped look smooth gradients get when there aren't enough shades to cover a subtle transition. It shows most in dark, low-contrast areas, and it gets worse when a platform recompresses your upload. Fine grain helps hide it; so does exporting a lossless PNG. [Gradient banding](https://gradiently.design/guide/gradient-banding) covers the fixes in depth. - Banded: visible steps: `linear-gradient(90deg, #14132b 0% 12.5%, #18173a 12.5% 25%, #1d1b48 25% 37.5%, #221f57 37.5% 50%, #282466 50% 62.5%, #2e2975 62.5% 75%, #342e84 75% 87.5%, #3a3393 87.5% 100%)` - Smooth: the same colours: `linear-gradient(90deg, #14132b 0%, #3a3393 100%)` Banding, exaggerated so you can see it. In generated images it is subtler, and usually appears in the darkest parts first. ## Artefacts and uniqueness Artefacts are the tells of generation: soft smudges where detail gave up, a patch that repeats, edges that warp, or faint letter-like shapes that look like text from far away. Zoom into each corner and the centre. For a background that will sit behind your brand every week, any artefact you notice now, your audience will notice eventually. Uniqueness is the check people skip. Generators drift toward the most common result for a prompt, so a *soft purple gradient background* from one tool looks much like one from another. Compare yours with what already appears in your category. [AI art originality](https://gradiently.design/guide/ai-design-originality) explains why outputs converge and how to push them apart. ## Rights and editability Whether you can use a generated background commercially depends on the tool's terms and on the law where you are, and the rules are still developing. Read the terms before a background goes on paid campaigns, packaging or merchandise, and ask a professional if it matters. Editability is the practical question: a generated image is usually a flat file, so a new aspect ratio, a colour tweak or a moving version means generating again and hoping it matches. ### A generated image - A fixed file at one size - Other shapes mean cropping or regenerating - Colour changes mean regenerating - Usually still; motion is a separate process - Words sit on top of whatever is there ### A background built as a recipe - Redrawn at any size from its settings - Each format gets its own composition - Colours, material and light adjustable - Motion is part of the recipe - Can be made to respond to the words on it ## Always test with real words A background is for carrying something: a headline, a date, a product. Put your real words on it at the size they will be seen. If the headline crosses a bright, busy area, it will be hard to read, and the usual fixes, a box, a shadow or a blur, cost the look you chose the background for. A headline on a busy gradient material where the texture competes with the letters A background that ignores the words behind it… The same headline on the same material, now calmer and higher in contrast behind the words …and one that settles its calmest part behind them. ## Generated backgrounds versus Marks Gradiently takes the recipe route. A **Mark** is a living gradient and material background stored as colours, stacked materials, light, grain, motion and type, drawn afresh for every size, up to 16K on the long side from the Forge. It moves, makes room for your words, and has exactly one owner, and every new Mark is checked against every other before it is published, so nobody else is posting in yours. The library of Marks crafted by Gradiently is in the [Market](/market); you can make your own from a sentence in the [Forge](/forge), or from a photo with [Match a picture](https://gradiently.design/guide/match-a-picture). ## FAQ ### How do I know if an AI-generated background is good quality? Check it at 100% zoom at the size you need for blur, banding and artefacts, test it with your real words on it, and try it in a second format. ### Why does my AI background have stripes? That is banding: too few shades across a smooth transition, often worse after compression. Fine grain and lossless PNG exports help. ### Can I use AI-generated backgrounds commercially? It depends on the tool's terms and on local law, which are still developing. Read the terms first and ask a professional for important commercial uses. ### How is a Mark different from an AI-generated background? A Mark is stored as a recipe and drawn for any size, can move and make room for words, has one owner, and is checked against every other Mark for originality before it is published.