FS2_Open is the original FreeSpace 2 engine, released to the open source community by Volition in 2002. Ever since then, a dedicated team has been hard at work keeping the engine up-to-date, enhancing it, fixing the bugs, and porting it to non-Windows platforms.
that's one thing i like about the SCP graphics packs
it makes it easier to tell the difference between two like-modeled cruisers, like the Fenris and Leviathon, as well as the Lilith and the Cain
keep up the good work