Set your desired scale or angle and export the resulting .pat file. : Copy your new .pat file into the AutoCAD Support folder .
To convert a (AutoCAD drawing) into a PAT (hatch pattern) file, you must first simplify your geometry, as hatch patterns only support straight line segments. Step-by-Step Conversion Process Prepare the Geometry :
For basic linear patterns, you can write the code yourself using a text editor like Write the Header : Start with an asterisk followed by the pattern name: *PatternName, Description Add Data Lines : Each subsequent line defines a pattern segment:
However, you can achieve this using specific utilities or manual workflows. 1. Extracting an Existing Hatch to .PAT
A .PAT file is essentially a text-based set of coordinates and instructions that tell AutoCAD how to repeat lines to form a pattern. Because hatch patterns are mathematical repetitions, they can only be created from simple linear geometry.