Autodesk AutoCAD uses PAT files to store hatch pattern definitions. While CAD software includes standard hatch patterns, designers frequently need custom patterns for materials like brick, stone, thatch, or geometric tiles.
If you want, I can:
Creating custom hatch patterns is notoriously difficult. While AutoCAD gives you thousands of out-of-the-box options, real-world architecture often requires specific materials—custom tile layouts, unique shingles, or proprietary flooring—that just don't exist in the standard library.
The phrase is searched by people who have been burned by mediocre software. They have wasted afternoons wrestling with syntax errors. They have presented drawings where the "wood grain" looked like a glitched video game.
Do you prefer a or a dedicated graphical program ?
Which are you using? (e.g., AutoCAD 2026, LT, BricsCAD)