IGES files are used to import and export NURBS objects to and from 3ds Max (and other programs that support this file format). For more information, see Overview of IGES in 3ds Max.
In some cases, when you import an IGES file, the translation doesn't produce exact replicas. To understand what happens to each entity when it's translated, review the IGES to 3ds Max Import Table.
3ds Max imports an object containing multiple surfaces as a single NURBS object. To work with a single surface of the object, detach it in sub-object NURBS and work with only that object. This releases the rest of the object from memory. For more information, see NURBS.
When you import IGES files, 3ds Max creates a log file containing detailed information about the processing of the model. The name of the file has the form of filename.xli. For more information, see IGES Log Files.
Application menu
Import.
You can choose IGES (*.IGE, *.IGS, *.IGES) from the Files Of Type list to display only IGES files.