B-dtl1-2.tga was upside down in br-capships.mat, which caused the Bretonia Battleship to look a bit strange sometimes. Additionally, both textures in br_turrets.mat were generated without additional mips. Both issues have been fixed in this commit.
The transparent parts on the inside looked a bit weird in space, as if some areas weren't transparent at all. This has been fixed by completely deleting any colors in the transparent parts.