User blog comment:GramdOne/How can i open thesse sprite files?/@comment-3495717-20140715145743

Thanks for being so helpful Dyl.

Occasionally, you'll come across characters that use a newer type of sprite file that doesn't appear to open in older versions of Fighter Factory, commonly known as sffv2 (though still listed as a .sff file). Sffv2 sprite files are different from regular sff files as they store the character's palettes within themselves, meaning the .def file doesn't have to read a bunch of .act files for palettes to work, instead having the palettes mapped to a specific button, or something like that.

Case in point, Fighter Factory 3 is able to open sffv2, so yeah, get that.