Ring of Elysium freezes with reimported .dds file

[Bleidd64]

I unpacked Ring of Elysium .sfc files with qq_sfc script, altered one of the textures and reimported it. When the game loads everything's okay until it tries to load the altered texture (for example if I alter character's texture and then try to preview the character), then it freezes and I'm unable to do anything except force-closing the game

[GHFear]

I unpacked Ring of Elysium .sfc files with qq_sfc script, altered one of the textures and reimported it. When the game loads everything's okay until it tries to load the altered texture (for example if I alter character's texture and then try to preview the character), then it freezes and I'm unable to do anything except force-closing the game

Sounds like the wrong DDS format then.
Could be that you're importing a DXT1 when it's supposed to be a DXT3 or 5.
or you're not using the correct method of mipmapping.

[Bleidd64]

How do I check what format and method of mipmapping has been used? I'd prefer to not use an external program to edit the graphics, because GIMP does the job fine, but saving/converting from another format using external program is okay for me if it's not possible to do in GIMP