Pixel Art Generation: Grid, Palette, and Rights Contract¶
“Pixel-art style” and a usable pixel-art asset are different claims. A usable asset has a declared logical grid, palette, transparency behavior, and export contract; a generative model can produce an image that resembles pixel art without satisfying any of them.
Pillow's resampling documentation defines nearest-neighbor resampling as selecting one nearest input pixel, and its Image API documents quantization controls. Those are raster operations, not evidence that a chosen grid or palette preserves a particular source. The SD-piXL paper describes one research approach that makes output size and palette explicit; it does not certify other generators, adapters, APIs, or production asset pipelines.
Declare the asset contract¶
For each asset or batch, record:
- intended use, display scale, logical width/height, integer pixel scale, origin/anchor, tileability, sprite-sheet layout, orientation, frame order, timing, collision/metadata needs, and acceptance target;
- palette entries/order, indexed or true-color format, color profile, alpha convention, transparent index, dithering rule, and whether anti-aliasing is permitted;
- source asset digest and authority, requested change scope, model/raster tool release, input prompt/reference/mask, seed or determinism controls, and every resize/quantize/export step;
- training-data or reference rights, consent/attribution/retention policy, and prohibition on treating generated assets as their source; and
- exported file digest, deterministic conversion receipt where applicable, visual review, and correction history.
If an image is resampled or quantized, preserve the pre-transform asset and the exact transform settings. Do not infer the original unit grid from appearance alone or call a larger anti-aliased rendering lossless pixel art.
Review at target scale and in sequence¶
Inspect source and export at native logical scale, intended scaled display, and in the game/UI background where it will appear. Review silhouette, readability, palette separation, outlines, intentional aliasing, tile seams, frame-to-frame consistency, sprite alignment, alpha fringes, text, product geometry, and factual detail.
For generated work, label all invented or altered detail. For animations and sprite sheets, test frames, pivot/anchor, order, duration, and loop/transition behavior as a single asset contract rather than accepting isolated stills.
Failure boundary¶
If grid/palette/alpha/export details, source authority, model/tool release, or visual review is unknown, stop in review state. Do not silently smooth, recolor, interpolate, crop, substitute a provider/model, or use a generated asset as licensed source material.