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:
Before starting the conversion process, it is useful to understand how these formats differ structurally.
Converting DWG files to PAT files is a common necessity for architects, engineers, and CAD technicians. DWG is the standard native format for AutoCAD drawings, containing geometric data, while PAT is the specific file format used to store hatch pattern definitions. Transforming full drawing geometry into a repeatable hatch pattern allows you to create custom fills for materials like brick, tile, stone, or cladding. convert dwg to pat file
A successful conversion depends entirely on how you prepare your linework in the DWG file. If your geometry is messy, the resulting hatch pattern will break, overlap, or fail to load. Follow these strict rules before using any conversion tool:
If your DWG already contains the hatch you want to save, use a LISP routine to extract the definition. For basic linear patterns, you can write the
*Brick_FromDWG, My converted brick pattern ; Generated from DWG geometry 0, 0,0, 0,4, 8,-8 90, 0,0, 8,8, 4,-4
can automate this. You simply load the script into AutoCAD, select the hatch, and it generates the PAT definition for you. The Revit Export "Trick": Transforming full drawing geometry into a repeatable hatch
Select the geometry and turn it into a block ( BLOCK command).