Softimage 2014 now supports scene (.scn) and model (.emdl) files of size up to 4 GB. That’s on Windows. On Linux, the limit is [still?] 2 GB.
Note that this applies only to scenes and models saved from Softimage 2014. You can’t save a huge 3GB scene out of Softimage 2013 and load it into Softimage 2014. Large files saved by 2013 and older are not saved properly, and won’t load into 2014.
On Linux, Softimage 2014 will warn you if you save a file that exceeds 2GB. Presumably that will give you a chance to reduce the file size, or save out models, so you can re-load the assets later.