: Draw your pattern within a 1x1 unit square near the origin (0,0) to ensure proper scaling and alignment. Export to DXF
Example approach:
Standard AutoCAD does not export .pat files natively. You need the (a plugin by CADro). convert dwg to pat file
Websites like or A360 Viewer claim to do DWG to PAT. They do not. They convert DWG to PNG or SVG. You can then trace the SVG into a PAT manually. This is essentially a screen capture. : Draw your pattern within a 1x1 unit
Once you have your .pat file, you must tell AutoCAD where to find it: convert dwg to pat file
The AutoCAD community has developed numerous LISP scripts to automate this. One of the most famous is or similar variants found on forums like CADTutor or TheSwamp.