Convert Dwg To Pat File 【PREMIUM | Guide】

*weaver_terrazzo, Terrazzo pattern from DWG file
; Generated by Dynamic Pattern Weaver v1.0
; Tile size: 12.00x12.00 units
45, 0,0, 0,12, 6,-6

Converting a DWG file to a PAT (Hatch Pattern) file is not a standard "Save As" function in AutoCAD, as PAT files require specific line definitions. Depending on whether you are trying to extract an existing hatch or create a new one from geometry, use one of the methods below. Method 1: Extract Existing Hatches (LISP Routine)

If your DWG already contains the hatch you want to save, use a LISP routine to extract the definition.

Download a LISP utility: Utilities like GETPAT or PatOut are specifically designed for this.

Load the routine: In AutoCAD, type APPLOAD, locate your downloaded .lsp file, and click Load.

Run the command: Type GETPAT (or the specific command for your chosen LISP).

Select the hatch: Click on the hatch pattern in your drawing. The routine will generate a .pat file, usually saved to your desktop or the drawing's folder. Method 2: Create a New PAT from DWG Geometry

If you have drawn geometry (lines/polylines) that you want to turn into a repeating hatch, follow these steps:

Clean the geometry: Ensure your pattern is made ONLY of lines or polylines. Arcs, circles, and splines are generally not supported in standard PAT files.

Explode blocks: If your pattern is a block, use the EXPLODE command so the geometry is simple.

Move to Origin: Move the lower-left corner of your repeating tile to 0,0 to ensure proper alignment when the hatch repeats.

Export as DXF: Select the geometry and use the DXFOUT command. Save it as an older version (like AutoCAD 2000 DXF) for maximum compatibility with converters.

Use an Online Converter: Upload your DXF to a specialized tool like Pattycake or other online DXF to PAT converters to generate the file. Method 3: The "Superhatch" Alternative (No PAT needed) convert dwg to pat file

If you don't strictly need a .pat file and just want to use a block or image as a hatch, use the Express Tools in full AutoCAD. Block to PAT — AutoCAD Pattern Conversion #AutoCAD #Tips

Converting a DWG (AutoCAD Drawing) to a PAT (AutoCAD Hatch Pattern) file is a common challenge for designers who want to turn custom linework into reusable textures. Since AutoCAD doesn’t have a native "Save As PAT" button, you need a workflow to bridge the gap.

Here is a comprehensive guide on how to transform your CAD geometry into a functional hatch pattern. 1. Prepare Your Linework

Before converting, your geometry must be "hatch-ready." Hatch patterns in AutoCAD are mathematical repetitions of lines, so your source drawing needs to be precise.

Keep it Simple: Use only Lines and Points. Hatch patterns do not support polylines, circles, or arcs. Explode any complex shapes into individual line segments.

The "Tile" Concept: Draw your pattern within a 1x1 unit square. Ensure that lines exiting the right side of the square align perfectly with lines entering the left side to create a seamless loop.

Origin Point: Move your geometry so the bottom-left corner sits at the coordinates 0,0,0. 2. Method A: Using Express Tools (SuperHatch)

If you don’t strictly need a .pat file but want to use your DWG as a hatch, AutoCAD’s built-in SuperHatch command is the fastest route. Type SUPERHATCH in the command line. Select Block to use your DWG geometry.

Follow the prompts to select your objects and define the boundary.

Note: This embeds the pattern in the specific drawing rather than creating a portable file. 3. Method B: Using Specialized Plugins (Recommended)

To create a standalone .pat file that you can share or use across multiple projects, a plugin is the most reliable method. *weaver_terrazzo, Terrazzo pattern from DWG file ; Generated

HatchKit: The industry standard for editing and converting CAD shapes to patterns. It allows you to import a DWG and visually arrange the tiling before exporting.

CADwerx PAT-Add: A lightweight utility specifically for "reading" selected lines in AutoCAD and writing them directly into a pattern file. 4. Method C: The Manual Coding Route (Advanced)

Converting a DWG file to a PAT file is not a standard "Save As" function in AutoCAD, as these formats serve different purposes: DWG stores entire vector drawings, while PAT files contain text-based mathematical definitions for repeating hatch patterns. 

To bridge this gap, you must use specific tools or manual workflows to extract or define the geometric data into a pattern format.  Key Methods for Conversion  SAVING AUTOCAD DWG AS .PAT FILE - Forums, Autodesk

Converting a DWG (AutoCAD Drawing) to a PAT (Hatch Pattern) file is a frequent challenge because there is no native "Save As" option in AutoCAD to perform this switch

. While a DWG contains complex geometry, a PAT file is a simplified text-based instruction set that tells AutoCAD how to repeat a specific pattern. Autodesk Community, Autodesk Forums, Autodesk Forum Depending on whether you are trying to a pattern from an existing drawing or

a new one from scratch, here is an in-depth look at the best methods available. 1. Extracting Patterns from an Existing DWG

If you have a drawing that already contains a custom hatch, but you don't have the original PAT file, you can "rescue" it using these methods: LISP Utilities (The Most Efficient Way): Free scripts like

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":

If you use Revit, you can import the DWG into a Revit project, explode it, and then export it back out. During specific export phases, Revit often generates temporary PAT files in the export folder that you can copy before they are finalized and deleted. Contact the Creator:

Because custom hatches are embedded in the DWG metadata, it is often simpler to just ask the original author for their support files. Autodesk Community, Autodesk Forums, Autodesk Forum 2. Creating a New PAT File from DWG Geometry Converting a DWG file to a PAT (Hatch

If you have drawn a custom shape (like a specific tile layout) and want to turn it into a reusable hatch, follow these steps:

Converting a (AutoCAD drawing) to a (hatch pattern) file is essentially the process of turning custom line-work into a repeatable pattern definition. Since AutoCAD does not have a native "Save As PAT" button, you must use one of the following methods to bridge the gap. Method 1: Using LISP Utilities (Most Efficient)

The most common way to extract a pattern from a drawing is using a LISP routine. A popular, free tool is Download & Load : Obtain the PatOut.lsp getpat.lsp utility from a reliable source like the : In AutoCAD, type , locate your downloaded LISP file, and click Run the Command

in the command line. Select the existing hatch pattern in your DWG that you want to export. It will automatically generate a separate

, then select the hatch. The definition will be saved to a file named after the pattern (e.g., ZIGZAG.pat Method 2: Export via DXF and Online Converter

If you have raw geometry (lines) instead of an existing hatch, you can use a converter. Simplify Geometry

: Ensure your pattern consists only of lines or polylines. Explode any blocks and avoid arcs or splines, as these are often not supported by simple PAT formats. Move to Origin : Move your geometry close to the coordinates to prevent alignment errors. Export as DXF and save your selection as an AutoCAD 2000 DXF : Use an online DXF-to-PAT converter (e.g., ) to upload the DXF and download your new PAT file. Autodesk Community, Autodesk Forums, Autodesk Forum Method 3: Manual Creation (For Simple Patterns)

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:

Here is useful, actionable content for anyone searching “convert DWG to PAT file” .

Instead of converting DWG→PAT, use DWG as a superhatch:

*MyPattern, 45-degree hatch
45, 0,0, 10,10