Photoshop patterns are useful when a surface needs repeatable geometry, paper detail, fabric, halftone, floral, retro or abstract texture without manually duplicating a tile. Searches such as Photoshop pattern, seamless pattern, PAT file, geometric pattern, floral pattern and halftone pattern often focus on style, but repeat quality matters just as much. A pattern should tile without visible edge jumps and remain useful at more than one scale.
Load the PAT preset or source tile and fill an area several times larger than the original repeat. Zoom out to see obvious clusters and zoom in to inspect seams. A pattern that looks clean as one square can reveal lines, dark bands or repeated objects when tiled across a poster or package. This test is especially important for high-contrast geometric and photographic patterns.