The transition from a standard AutoCAD drawing (DWG) to a functional hatch pattern file (PAT) represents a critical bridge between custom architectural design and repeatable CAD drafting. While DWG files contain complex geometric data, a PAT file is a simplified text-based definition used to repeat a tileable design across areas. The Mechanics of Conversion
Sometimes you don't actually need a .pat file to achieve the desired result: dwg to pat converter
Here is the full text for a DWG to PAT Converter software tool, structured as it would appear on a landing page, user manual, or software description. The transition from a standard AutoCAD drawing (DWG)