The IGS file extension is associated with International Graphics Exchange Standard (IGES, pronounced eye-jess), a vendor-neutral file format that allows the digital exchange of information among computer-aided design (CAD) systems.. IGS file may contain wireframe models, surface or solid object representations, circuit diagrams, and other objects.
The IGS file extension is associated with Indigo Renderer, an application used for generating photorealistic images. IGS file is used for 3D scene file.