ok, let me describe my problem exactly.
I want to remove the abration part located at the wing root, so that the whole wing looks new and painted.
I opened the (_n) file, then find this part looks a little bit more yellow than the other parts.
So I just make a new layer, and paint this part as green as the other parts.
Then save the DDS as: DXT3, no mipmap. This is my DDS settings.
http://imgbox.com/lvB18KPl
But it turns out very strange, very shining.
http://imgbox.com/GlxUEQik
http://imgbox.com/ESfoiBxi
The first one is the file with problem. The second one is the normal file.