The first two images are captures of the things I'm talking about opened in OpenBRF. The third photo is these meshes shown in-game, with the broken lighting.
Title explains it all, basically. Having a bit of trouble with the shading (I think it's the specular maps) for some custom textures I've applied to some existing meshes in-game. They appear to have proper lighting in OpenBRF but in-game they appear without proper lighting.