The file extension IGS is associated with Initial Graphics Exchange Specification and Indigo Renderer. The Initial Graphics Exchange Specification is a graphics format which is used by a variety of Computer Aided Design programs. Indigo Renderer is a photorealistic rendering program developed by Glare Technologies for achieving image realism using the physics of light.
If the file extension IGS is classified as an Initial Graphics Exchange Specification file, the file is a CAD file type that contains two and three dimensional vector graphics which are typically stored in plain text ASCII format. The files contain drawings of objects, models, circuitry design, and other types of objects. The IGES project was started in the late 1970s by a group of CAD users and vendors with the support of the National Bureau of Standards (NIST) and the U.S. Department of Defense.
If the IGS files are associated with Indigo Renderer, they are an image file type that contains three dimensional images which have been imported into Indigo Renderer and rendered into a photorealistic image. The images are typically imported from other three dimensional image creation programs such as 3ds Max and Cinema 4D.
How to Open IGS Files
If the IGS file is defined as an Initial Graphics Exchange Specification file and you use Windows, you can open the file using AutoCAD with an IGES import plugin. AutoCAD is available on the AutoDesk website and you can also use AutoDeskâ€™s Inventor Fusion, which is available on the same website as well. You can also use ACD Systems Canvas 14, which is a program used by engineers and technical graphics professionals and is available as a free trial download on the ACDSee website.
For Mac OS X, you can open IGES IGS files using IMSI TurboCAD Deluxe, which is available as a paid download on the TurboCAD website. You can also use FreeCAD, which is an open source Computer Aided Design program available as a free download on the SourceForge website. FreeCAD is compatible with Windows, Mac OS X, and the Linux operating system.
IGS files that are related to Indigo Renderer can be opened using the Indigo Renderer program which is available for download in the Glare Technologies Store online. Indigo Renderer is compatible with Windows, Mac OS X, and the Linux operating system. It is also possible to open IGS files using Indigo RT, which is also available in the Glare Technologies Store and is multiplatform as well.
IGS files of this type can also be opened using Google SketchUp, Blender, Cinema 4D, and Maya. Keep in mind that if you use one of these programs to open the file, you will lose some of the rendering effects implemented by the Indigo application.