📁 DWG to IGES: How to Convert AutoCAD Drawing to IGS Model

How to Convert DWG to IGES?

Exporting DWG drawings to IGES is now a fast, clean 3-step process - no technical expertise required:

  1. 📥 Install Automesher Application

    Download and install Automesher Application for AutoCAD, BricsCAD, GstarCAD, or ZWCAD - it adds the AmExportMesh command needed to export IGES files directly from DWG drawings. Restart your CAD software after installation to load the plugin.

  2. ▶️ Run IGES Export Command

    Type AmExportMesh in the command line and press Enter. Select the 3D entities you want to export from the DWG model space - supported types include Polyface Mesh, Polygon Mesh, 3D Solid, and 3D Face - then press Enter again to confirm the selection.

  3. 💾 Save as IGES File

    In the save dialog, select IGES (*.igs, *.iges) as the output format, choose your destination folder and filename, then click Save. Automesher converts the selected DWG entities and writes them to your file.

DWG What is a DWG File? (AutoCAD 2D/3D CAD Drawing Explained)

The DWG file format is a proprietary binary format developed by Autodesk for storing 2D drawings and 3D models in CAD (Computer-Aided Design) workflows. As the native format for AutoCAD, DWG files are widely recognized as the industry standard across architecture, engineering, and construction sectors for their precision, flexibility, and cross-platform compatibility.

Key Features of DWG Files

  • Broad Compatibility: DWG files work seamlessly with popular CAD programs like AutoCAD, BricsCAD, ZWCAD, and IntelliCAD, ensuring easy sharing and collaboration across different software environments.
  • High-Precision Vector Data: DWG files store exact vector-based 2D graphics, 3D models, and rich metadata, making them ideal for detailed blueprints, architectural designs, and complex engineering projects.
  • Efficient Use of Blocks: DWG drawings support reusable "blocks" - predefined components like symbols or templates - that help streamline design workflows, ensure consistency, and reduce file sizes.

DWG File Conversion Made Simple

Looking to convert DWG files into popular 3D or GIS formats like OBJ, STL, DXF, KML, or KMZ? Our tools, Automesher Application and Automapki Application, enable fast, accurate DWG conversions while preserving design details. Convert DWG to SKP, STL, KML, and more - start your free trial today and experience hassle-free CAD data transformation!

IGS IGES File Format - Initial Graphics Exchange Explained

The IGES (Initial Graphics Exchange Specification) file format is widely used across CAD (Computer-Aided Design), CAM (Computer-Aided Manufacturing), and CAE (Computer-Aided Engineering) industries for transferring 3D models and complex designs between different software platforms. Developed in the 1980s and standardized by ANSI and ISO, IGES remains a crucial, legacy-neutral format for 3D data exchange, ensuring long-term interoperability.

What is an IGES (.IGS) File?

IGES files store detailed 3D CAD data using a text-based format that can represent wireframes, surfaces, and solid models. It enables seamless sharing of geometric information without dependency on proprietary software, making it ideal for collaborative projects across engineering, manufacturing, and design fields.

Key Features of the IGES/IGS Format

  • Text-Based Geometry Storage: All geometric and structural data is saved in human-readable ASCII text, allowing easy manual editing but often resulting in larger file sizes for complex designs.
  • Color Information: IGES supports color at the assembly level, preserving important visual distinctions between different components and parts in a model.
  • Transparency Limitations: Unlike newer 3D file formats, IGES does not support transparency (alpha channels), meaning that opacity settings in original designs are not retained after export.

IGES/IGS File Conversion and Processing

Autoconverter offers complete read and write support for IGES files using the Open Cascade technology stack, ensuring full compatibility with the latest IGES specifications. It processes IGES data as triangulated mesh geometry for maximum compatibility. For workflows requiring preservation of native NURBS surfaces and smooth 3D definitions, we recommend using Autoshaper, which maintains original surface accuracy throughout the conversion process.

DWG vs IGES - Comparison

The comparison table below highlights the key differences between DWG and IGES for 3D modeling, CAD, and GIS applications.

Feature DWG IGES
Extensions .dwg .igs, .iges
Name AutoCAD DWG Drawing Initial Graphics Exchange Specification
Versions
  • Min: AutoCAD 2010
  • Max: AutoCAD 2027
🚫
Textures ✅ ❌
Colors ✅ ✅
Geometry Components ✅ ❌
User Attributes ✅ ❌
Quads ✅ ❌
Importers
Exporters

More DWG and IGES Conversion Guides

Not sure how to handle DWG to IGES conversion? Our expert guides below walk you through DWG drawings conversion clearly and efficiently:

👉 Want to convert DWG and IGES formats without the hassle? Our DWG to IGES converter makes the process fast, clean, and error-free - try it now.