Ensure all lines have a Z-coordinate of zero ( FLATTEN command).
It allows the creation of custom, standard-compliant hatching for architectural, structural, or topographical drawings. How to Convert DWG to PAT (Methods) dwg to pat converter
Whether you prefer a or a standalone professional tool . Ensure all lines have a Z-coordinate of zero
Paste it into the AutoCAD Support folder. (Typically found under: C:\Users\[Username]\AppData\Roaming\Autodesk\AutoCAD [Version]\R[Version]\enu\Support ). Open AutoCAD and type HATCH . Paste it into the AutoCAD Support folder
If you do not have a full version of AutoCAD (for example, if you use AutoCAD LT, which doesn't support LISP routines or Express Tools), you can use standalone converter programs. Software like or specialized online conversion portals let you upload a clean DXF/DWG file of your pattern tile and download the compiled PAT text file. Step-by-Step: How to Prepare Your DWG for Conversion
Browse to your newly saved .pat file, adjust the scale, and apply it to a closed boundary. Best Practices for Perfect Hatch Conversion