Yeah, that's why I need it. For the normal maps. Which other ones should I use? And also, what I mean is, when I use the bumped specular shader for my probe core in Unity, and I put the normal map in the bump section, it says fix now, and then the normal texture works! My prope core has depth! But only when the files are PNG. If they are DDS, then the fix now button doesn't appear, and the probe core looks strange. Also, when I export with Unity using Part Tools, there's no option to export the textures as DDS.