Convert IGS to CGR

Understanding IGES and CGR file formats

IGES (Initial Graphics Exchange Specification, .igs or .iges) is a widely used neutral file format for exchanging 2D and 3D CAD data between different CAD systems. It supports wireframe, surface, and solid geometry, making it a popular choice for interoperability in engineering and manufacturing workflows.

CGR (CATIA Graphical Representation, .cgr) is a lightweight 3D visualization format developed by Dassault Systèmes for use with CATIA and other Dassault applications. CGR files are optimized for fast loading and visualization, containing tessellated geometry rather than full CAD data, making them ideal for sharing and reviewing large assemblies.

Why convert IGES to CGR?

Converting IGES to CGR is useful when you need to visualize or share complex CAD models in a lightweight format, especially for use in CATIA or 3DEXPERIENCE environments. CGR files are much smaller and load faster, making them suitable for collaboration, review, and digital mock-up processes.

How to convert IGES to CGR

Direct conversion from IGES to CGR typically requires specialized CAD software, as CGR is a proprietary format. The most reliable method is using Dassault Systèmes CATIA or 3DEXPERIENCE platform, which natively supports both formats.

Using CATIA V5

1. Open CATIA V5.
2. Go to File → Open and select your IGES (.igs) file.
3. Once the model is loaded, go to File → Save As.
4. In the Save as type dropdown, select CGR (*.cgr).
5. Choose your destination folder and click Save.

Alternative: Using 3DEXPERIENCE or DELMIA/ENOVIA

If you have access to the 3DEXPERIENCE platform or other Dassault Systèmes tools like DELMIA or ENOVIA, you can import IGES files and export them as CGR using similar steps via their respective import/export modules.

Recommended software for IGES to CGR conversion

• CATIA V5 – The most robust and direct solution for IGES to CGR conversion.
• 3DEXPERIENCE – For enterprise-level workflows and cloud-based collaboration.

There are no reliable free online converters for this process due to the proprietary nature of the CGR format. Using official Dassault Systèmes software ensures compatibility and data integrity.

Summary

To convert IGES to CGR, use CATIA V5 or 3DEXPERIENCE for accurate and efficient results. This process is essential for sharing and visualizing complex CAD data in a lightweight, high-performance format within Dassault Systèmes environments.